Merge branch 'main' into prepare-523

35 files changed, 457 insertions, 331 deletions

diff --git a/js/.eslintrc.json b/js/.eslintrc.json
new file mode 100644
index 000000000..97ea9e043
--- /dev/null
+++ b/js/.eslintrc.json
@@ -0,0 +1,26 @@
+{
+  "extends": "../.eslintrc.json",
+  "env": {
+    "es2022": true
+  },
+  "parserOptions": {
+    "ecmaVersion": "latest",
+    "sourceType": "module"
+  },
+  "overrides": [
+    {
+      "files": [
+        "./*.js",
+        "./src/**/*.js"
+      ],
+      "rules": {
+        "import/extensions": [
+          2,
+          {
+            "js": "always"
+          }
+        ]
+      }
+    }
+  ]
+}
diff --git a/js/index.esm.js b/js/index.esm.js
index b83764990..a3c9c84d4 100644
--- a/js/index.esm.js
+++ b/js/index.esm.js
@@ -5,15 +5,15 @@
  * --------------------------------------------------------------------------
  */
 
-export { default as Alert } from './src/alert'
-export { default as Button } from './src/button'
-export { default as Carousel } from './src/carousel'
-export { default as Collapse } from './src/collapse'
-export { default as Dropdown } from './src/dropdown'
-export { default as Modal } from './src/modal'
-export { default as Offcanvas } from './src/offcanvas'
-export { default as Popover } from './src/popover'
-export { default as ScrollSpy } from './src/scrollspy'
-export { default as Tab } from './src/tab'
-export { default as Toast } from './src/toast'
-export { default as Tooltip } from './src/tooltip'
+export { default as Alert } from './src/alert.js'
+export { default as Button } from './src/button.js'
+export { default as Carousel } from './src/carousel.js'
+export { default as Collapse } from './src/collapse.js'
+export { default as Dropdown } from './src/dropdown.js'
+export { default as Modal } from './src/modal.js'
+export { default as Offcanvas } from './src/offcanvas.js'
+export { default as Popover } from './src/popover.js'
+export { default as ScrollSpy } from './src/scrollspy.js'
+export { default as Tab } from './src/tab.js'
+export { default as Toast } from './src/toast.js'
+export { default as Tooltip } from './src/tooltip.js'
diff --git a/js/index.umd.js b/js/index.umd.js
index 5abe8db53..a8113f3de 100644
--- a/js/index.umd.js
+++ b/js/index.umd.js
@@ -5,18 +5,18 @@
  * --------------------------------------------------------------------------
  */
 
-import Alert from './src/alert'
-import Button from './src/button'
-import Carousel from './src/carousel'
-import Collapse from './src/collapse'
-import Dropdown from './src/dropdown'
-import Modal from './src/modal'
-import Offcanvas from './src/offcanvas'
-import Popover from './src/popover'
-import ScrollSpy from './src/scrollspy'
-import Tab from './src/tab'
-import Toast from './src/toast'
-import Tooltip from './src/tooltip'
+import Alert from './src/alert.js'
+import Button from './src/button.js'
+import Carousel from './src/carousel.js'
+import Collapse from './src/collapse.js'
+import Dropdown from './src/dropdown.js'
+import Modal from './src/modal.js'
+import Offcanvas from './src/offcanvas.js'
+import Popover from './src/popover.js'
+import ScrollSpy from './src/scrollspy.js'
+import Tab from './src/tab.js'
+import Toast from './src/toast.js'
+import Tooltip from './src/tooltip.js'
 
 export default {
   Alert,
diff --git a/js/src/alert.js b/js/src/alert.js
index 59de828e9..a58408b7a 100644
--- a/js/src/alert.js
+++ b/js/src/alert.js
@@ -5,10 +5,10 @@
  * --------------------------------------------------------------------------
  */
 
-import { defineJQueryPlugin } from './util/index'
-import EventHandler from './dom/event-handler'
-import BaseComponent from './base-component'
-import { enableDismissTrigger } from './util/component-functions'
+import { defineJQueryPlugin } from './util/index.js'
+import EventHandler from './dom/event-handler.js'
+import BaseComponent from './base-component.js'
+import { enableDismissTrigger } from './util/component-functions.js'
 
 /**
  * Constants
diff --git a/js/src/base-component.js b/js/src/base-component.js
index 0c1a2592d..ea266cee8 100644
--- a/js/src/base-component.js
+++ b/js/src/base-component.js
@@ -5,10 +5,10 @@
  * --------------------------------------------------------------------------
  */
 
-import Data from './dom/data'
-import { executeAfterTransition, getElement } from './util/index'
-import EventHandler from './dom/event-handler'
-import Config from './util/config'
+import Data from './dom/data.js'
+import { executeAfterTransition, getElement } from './util/index.js'
+import EventHandler from './dom/event-handler.js'
+import Config from './util/config.js'
 
 /**
  * Constants
diff --git a/js/src/button.js b/js/src/button.js
index 03e76041a..f3185cb89 100644
--- a/js/src/button.js
+++ b/js/src/button.js
@@ -5,9 +5,9 @@
  * --------------------------------------------------------------------------
  */
 
-import { defineJQueryPlugin } from './util/index'
-import EventHandler from './dom/event-handler'
-import BaseComponent from './base-component'
+import { defineJQueryPlugin } from './util/index.js'
+import EventHandler from './dom/event-handler.js'
+import BaseComponent from './base-component.js'
 
 /**
  * Constants
diff --git a/js/src/carousel.js b/js/src/carousel.js
index 24bbe392a..d190075eb 100644
--- a/js/src/carousel.js
+++ b/js/src/carousel.js
@@ -7,18 +7,17 @@
 
 import {
   defineJQueryPlugin,
-  getElementFromSelector,
   getNextActiveElement,
   isRTL,
   isVisible,
   reflow,
   triggerTransitionEnd
-} from './util/index'
-import EventHandler from './dom/event-handler'
-import Manipulator from './dom/manipulator'
-import SelectorEngine from './dom/selector-engine'
-import Swipe from './util/swipe'
-import BaseComponent from './base-component'
+} from './util/index.js'
+import EventHandler from './dom/event-handler.js'
+import Manipulator from './dom/manipulator.js'
+import SelectorEngine from './dom/selector-engine.js'
+import Swipe from './util/swipe.js'
+import BaseComponent from './base-component.js'
 
 /**
  * Constants
@@ -431,7 +430,7 @@ class Carousel extends BaseComponent {
  */
 
 EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_SLIDE, function (event) {
-  const target = getElementFromSelector(this)
+  const target = SelectorEngine.getElementFromSelector(this)
 
   if (!target || !target.classList.contains(CLASS_NAME_CAROUSEL)) {
     return
diff --git a/js/src/collapse.js b/js/src/collapse.js
index 204d18081..16250c870 100644
--- a/js/src/collapse.js
+++ b/js/src/collapse.js
@@ -8,13 +8,11 @@
 import {
   defineJQueryPlugin,
   getElement,
-  getElementFromSelector,
-  getSelectorFromElement,
   reflow
-} from './util/index'
-import EventHandler from './dom/event-handler'
-import SelectorEngine from './dom/selector-engine'
-import BaseComponent from './base-component'
+} from './util/index.js'
+import EventHandler from './dom/event-handler.js'
+import SelectorEngine from './dom/selector-engine.js'
+import BaseComponent from './base-component.js'
 
 /**
  * Constants
@@ -68,7 +66,7 @@ class Collapse extends BaseComponent {
     const toggleList = SelectorEngine.find(SELECTOR_DATA_TOGGLE)
 
     for (const elem of toggleList) {
-      const selector = getSelectorFromElement(elem)
+      const selector = SelectorEngine.getSelectorFromElement(elem)
       const filterElement = SelectorEngine.find(selector)
         .filter(foundElement => foundElement === this._element)
 
@@ -185,7 +183,7 @@ class Collapse extends BaseComponent {
     this._element.classList.remove(CLASS_NAME_COLLAPSE, CLASS_NAME_SHOW)
 
     for (const trigger of this._triggerArray) {
-      const element = getElementFromSelector(trigger)
+      const element = SelectorEngine.getElementFromSelector(trigger)
 
       if (element && !this._isShown(element)) {
         this._addAriaAndCollapsedClass([trigger], false)
@@ -229,7 +227,7 @@ class Collapse extends BaseComponent {
     const children = this._getFirstLevelChildren(SELECTOR_DATA_TOGGLE)
 
     for (const element of children) {
-      const selected = getElementFromSelector(element)
+      const selected = SelectorEngine.getElementFromSelector(element)
 
       if (selected) {
         this._addAriaAndCollapsedClass([element], this._isShown(selected))
@@ -285,10 +283,7 @@ EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, function (
     event.preventDefault()
   }
 
-  const selector = getSelectorFromElement(this)
-  const selectorElements = SelectorEngine.find(selector)
-
-  for (const element of selectorElements) {
+  for (const element of SelectorEngine.getMultipleElementsFromSelector(this)) {
     Collapse.getOrCreateInstance(element, { toggle: false }).toggle()
   }
 })
diff --git a/js/src/dom/event-handler.js b/js/src/dom/event-handler.js
index 9876d7733..fde195e7c 100644
--- a/js/src/dom/event-handler.js
+++ b/js/src/dom/event-handler.js
@@ -5,7 +5,7 @@
  * --------------------------------------------------------------------------
  */
 
-import { getjQuery } from '../util/index'
+import { getjQuery } from '../util/index.js'
 
 /**
  * Constants
@@ -198,9 +198,8 @@ function removeHandler(element, events, typeEvent, handler, delegationSelector)
 function removeNamespacedHandlers(element, events, typeEvent, namespace) {
   const storeElementEvent = events[typeEvent] || {}
 
-  for (const handlerKey of Object.keys(storeElementEvent)) {
+  for (const [handlerKey, event] of Object.entries(storeElementEvent)) {
     if (handlerKey.includes(namespace)) {
-      const event = storeElementEvent[handlerKey]
       removeHandler(element, events, typeEvent, event.callable, event.delegationSelector)
     }
   }
@@ -248,11 +247,10 @@ const EventHandler = {
       }
     }
 
-    for (const keyHandlers of Object.keys(storeElementEvent)) {
+    for (const [keyHandlers, event] of Object.entries(storeElementEvent)) {
       const handlerKey = keyHandlers.replace(stripUidRegex, '')
 
       if (!inNamespace || originalTypeEvent.includes(handlerKey)) {
-        const event = storeElementEvent[keyHandlers]
         removeHandler(element, events, typeEvent, event.callable, event.delegationSelector)
       }
     }
@@ -300,8 +298,8 @@ const EventHandler = {
   }
 }
 
-function hydrateObj(obj, meta) {
-  for (const [key, value] of Object.entries(meta || {})) {
+function hydrateObj(obj, meta = {}) {
+  for (const [key, value] of Object.entries(meta)) {
     try {
       obj[key] = value
     } catch {
diff --git a/js/src/dom/selector-engine.js b/js/src/dom/selector-engine.js
index 1ba104f9e..da93a35be 100644
--- a/js/src/dom/selector-engine.js
+++ b/js/src/dom/selector-engine.js
@@ -5,11 +5,32 @@
  * --------------------------------------------------------------------------
  */
 
-import { isDisabled, isVisible } from '../util/index'
+import { isDisabled, isVisible, parseSelector } from '../util/index.js'
 
-/**
- * Constants
- */
+const getSelector = element => {
+  let selector = element.getAttribute('data-bs-target')
+
+  if (!selector || selector === '#') {
+    let hrefAttribute = element.getAttribute('href')
+
+    // The only valid content that could double as a selector are IDs or classes,
+    // so everything starting with `#` or `.`. If a "real" URL is used as the selector,
+    // `document.querySelector` will rightfully complain it is invalid.
+    // See https://github.com/twbs/bootstrap/issues/32273
+    if (!hrefAttribute || (!hrefAttribute.includes('#') && !hrefAttribute.startsWith('.'))) {
+      return null
+    }
+
+    // Just in case some CMS puts out a full URL with the anchor appended
+    if (hrefAttribute.includes('#') && !hrefAttribute.startsWith('#')) {
+      hrefAttribute = `#${hrefAttribute.split('#')[1]}`
+    }
+
+    selector = hrefAttribute && hrefAttribute !== '#' ? hrefAttribute.trim() : null
+  }
+
+  return parseSelector(selector)
+}
 
 const SelectorEngine = {
   find(selector, element = document.documentElement) {
@@ -77,6 +98,28 @@ const SelectorEngine = {
     ].map(selector => `${selector}:not([tabindex^="-"])`).join(',')
 
     return this.find(focusables, element).filter(el => !isDisabled(el) && isVisible(el))
+  },
+
+  getSelectorFromElement(element) {
+    const selector = getSelector(element)
+
+    if (selector) {
+      return SelectorEngine.findOne(selector) ? selector : null
+    }
+
+    return null
+  },
+
+  getElementFromSelector(element) {
+    const selector = getSelector(element)
+
+    return selector ? SelectorEngine.findOne(selector) : null
+  },
+
+  getMultipleElementsFromSelector(element) {
+    const selector = getSelector(element)
+
+    return selector ? SelectorEngine.find(selector) : []
   }
 }
 
diff --git a/js/src/dropdown.js b/js/src/dropdown.js
index 9596baa9a..c699598f7 100644
--- a/js/src/dropdown.js
+++ b/js/src/dropdown.js
@@ -8,6 +8,7 @@
 import * as Popper from '@popperjs/core'
 import {
   defineJQueryPlugin,
+  execute,
   getElement,
   getNextActiveElement,
   isDisabled,
@@ -15,11 +16,11 @@ import {
   isRTL,
   isVisible,
   noop
-} from './util/index'
-import EventHandler from './dom/event-handler'
-import Manipulator from './dom/manipulator'
-import SelectorEngine from './dom/selector-engine'
-import BaseComponent from './base-component'
+} from './util/index.js'
+import EventHandler from './dom/event-handler.js'
+import Manipulator from './dom/manipulator.js'
+import SelectorEngine from './dom/selector-engine.js'
+import BaseComponent from './base-component.js'
 
 /**
  * Constants
@@ -319,7 +320,7 @@ class Dropdown extends BaseComponent {
 
     return {
       ...defaultBsPopperConfig,
-      ...(typeof this._config.popperConfig === 'function' ? this._config.popperConfig(defaultBsPopperConfig) : this._config.popperConfig)
+      ...execute(this._config.popperConfig, [defaultBsPopperConfig])
     }
   }
 
diff --git a/js/src/modal.js b/js/src/modal.js
index 26c7e8c93..da1bcdca3 100644
--- a/js/src/modal.js
+++ b/js/src/modal.js
@@ -5,14 +5,14 @@
  * --------------------------------------------------------------------------
  */
 
-import { defineJQueryPlugin, getElementFromSelector, isRTL, isVisible, reflow } from './util/index'
-import EventHandler from './dom/event-handler'
-import SelectorEngine from './dom/selector-engine'
-import ScrollBarHelper from './util/scrollbar'
-import BaseComponent from './base-component'
-import Backdrop from './util/backdrop'
-import FocusTrap from './util/focustrap'
-import { enableDismissTrigger } from './util/component-functions'
+import { defineJQueryPlugin, isRTL, isVisible, reflow } from './util/index.js'
+import EventHandler from './dom/event-handler.js'
+import SelectorEngine from './dom/selector-engine.js'
+import ScrollBarHelper from './util/scrollbar.js'
+import BaseComponent from './base-component.js'
+import Backdrop from './util/backdrop.js'
+import FocusTrap from './util/focustrap.js'
+import { enableDismissTrigger } from './util/component-functions.js'
 
 /**
  * Constants
@@ -336,7 +336,7 @@ class Modal extends BaseComponent {
  */
 
 EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, function (event) {
-  const target = getElementFromSelector(this)
+  const target = SelectorEngine.getElementFromSelector(this)
 
   if (['A', 'AREA'].includes(this.tagName)) {
     event.preventDefault()
diff --git a/js/src/offcanvas.js b/js/src/offcanvas.js
index 7dd06fd71..6dd1e720f 100644
--- a/js/src/offcanvas.js
+++ b/js/src/offcanvas.js
@@ -7,17 +7,16 @@
 
 import {
   defineJQueryPlugin,
-  getElementFromSelector,
   isDisabled,
   isVisible
-} from './util/index'
-import ScrollBarHelper from './util/scrollbar'
-import EventHandler from './dom/event-handler'
-import BaseComponent from './base-component'
-import SelectorEngine from './dom/selector-engine'
-import Backdrop from './util/backdrop'
-import FocusTrap from './util/focustrap'
-import { enableDismissTrigger } from './util/component-functions'
+} from './util/index.js'
+import ScrollBarHelper from './util/scrollbar.js'
+import EventHandler from './dom/event-handler.js'
+import BaseComponent from './base-component.js'
+import SelectorEngine from './dom/selector-engine.js'
+import Backdrop from './util/backdrop.js'
+import FocusTrap from './util/focustrap.js'
+import { enableDismissTrigger } from './util/component-functions.js'
 
 /**
  * Constants
@@ -231,7 +230,7 @@ class Offcanvas extends BaseComponent {
  */
 
 EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, function (event) {
-  const target = getElementFromSelector(this)
+  const target = SelectorEngine.getElementFromSelector(this)
 
   if (['A', 'AREA'].includes(this.tagName)) {
     event.preventDefault()
diff --git a/js/src/popover.js b/js/src/popover.js
index 1b09dd425..477545672 100644
--- a/js/src/popover.js
+++ b/js/src/popover.js
@@ -5,8 +5,8 @@
  * --------------------------------------------------------------------------
  */
 
-import { defineJQueryPlugin } from './util/index'
-import Tooltip from './tooltip'
+import { defineJQueryPlugin } from './util/index.js'
+import Tooltip from './tooltip.js'
 
 /**
  * Constants
diff --git a/js/src/scrollspy.js b/js/src/scrollspy.js
index 01aba997d..b2c8555c7 100644
--- a/js/src/scrollspy.js
+++ b/js/src/scrollspy.js
@@ -5,10 +5,10 @@
  * --------------------------------------------------------------------------
  */
 
-import { defineJQueryPlugin, getElement, isDisabled, isVisible } from './util/index'
-import EventHandler from './dom/event-handler'
-import SelectorEngine from './dom/selector-engine'
-import BaseComponent from './base-component'
+import { defineJQueryPlugin, getElement, isDisabled, isVisible } from './util/index.js'
+import EventHandler from './dom/event-handler.js'
+import SelectorEngine from './dom/selector-engine.js'
+import BaseComponent from './base-component.js'
 
 /**
  * Constants
diff --git a/js/src/tab.js b/js/src/tab.js
index 8dc4644c9..efd0398ff 100644
--- a/js/src/tab.js
+++ b/js/src/tab.js
@@ -5,10 +5,10 @@
  * --------------------------------------------------------------------------
  */
 
-import { defineJQueryPlugin, getElementFromSelector, getNextActiveElement, isDisabled } from './util/index'
-import EventHandler from './dom/event-handler'
-import SelectorEngine from './dom/selector-engine'
-import BaseComponent from './base-component'
+import { defineJQueryPlugin, getNextActiveElement, isDisabled } from './util/index.js'
+import EventHandler from './dom/event-handler.js'
+import SelectorEngine from './dom/selector-engine.js'
+import BaseComponent from './base-component.js'
 
 /**
  * Constants
@@ -106,7 +106,7 @@ class Tab extends BaseComponent {
 
     element.classList.add(CLASS_NAME_ACTIVE)
 
-    this._activate(getElementFromSelector(element)) // Search and activate/show the proper section
+    this._activate(SelectorEngine.getElementFromSelector(element)) // Search and activate/show the proper section
 
     const complete = () => {
       if (element.getAttribute('role') !== 'tab') {
@@ -133,7 +133,7 @@ class Tab extends BaseComponent {
     element.classList.remove(CLASS_NAME_ACTIVE)
     element.blur()
 
-    this._deactivate(getElementFromSelector(element)) // Search and deactivate the shown section too
+    this._deactivate(SelectorEngine.getElementFromSelector(element)) // Search and deactivate the shown section too
 
     const complete = () => {
       if (element.getAttribute('role') !== 'tab') {
@@ -203,7 +203,7 @@ class Tab extends BaseComponent {
   }
 
   _setInitialAttributesOnTargetPanel(child) {
-    const target = getElementFromSelector(child)
+    const target = SelectorEngine.getElementFromSelector(child)
 
     if (!target) {
       return
diff --git a/js/src/toast.js b/js/src/toast.js
index a7fe7751d..7c6c7c10b 100644
--- a/js/src/toast.js
+++ b/js/src/toast.js
@@ -5,10 +5,10 @@
  * --------------------------------------------------------------------------
  */
 
-import { defineJQueryPlugin, reflow } from './util/index'
-import EventHandler from './dom/event-handler'
-import BaseComponent from './base-component'
-import { enableDismissTrigger } from './util/component-functions'
+import { defineJQueryPlugin, reflow } from './util/index.js'
+import EventHandler from './dom/event-handler.js'
+import BaseComponent from './base-component.js'
+import { enableDismissTrigger } from './util/component-functions.js'
 
 /**
  * Constants
diff --git a/js/src/tooltip.js b/js/src/tooltip.js
index 748a0e198..85c4a39c8 100644
--- a/js/src/tooltip.js
+++ b/js/src/tooltip.js
@@ -6,12 +6,12 @@
  */
 
 import * as Popper from '@popperjs/core'
-import { defineJQueryPlugin, findShadowRoot, getElement, getUID, isRTL, noop } from './util/index'
-import { DefaultAllowlist } from './util/sanitizer'
-import EventHandler from './dom/event-handler'
-import Manipulator from './dom/manipulator'
-import BaseComponent from './base-component'
-import TemplateFactory from './util/template-factory'
+import { defineJQueryPlugin, execute, findShadowRoot, getElement, getUID, isRTL, noop } from './util/index.js'
+import { DefaultAllowlist } from './util/sanitizer.js'
+import EventHandler from './dom/event-handler.js'
+import Manipulator from './dom/manipulator.js'
+import BaseComponent from './base-component.js'
+import TemplateFactory from './util/template-factory.js'
 
 /**
  * Constants
@@ -370,9 +370,7 @@ class Tooltip extends BaseComponent {
   }
 
   _createPopper(tip) {
-    const placement = typeof this._config.placement === 'function' ?
-      this._config.placement.call(this, tip, this._element) :
-      this._config.placement
+    const placement = execute(this._config.placement, [this, tip, this._element])
     const attachment = AttachmentMap[placement.toUpperCase()]
     return Popper.createPopper(this._element, tip, this._getPopperConfig(attachment))
   }
@@ -392,7 +390,7 @@ class Tooltip extends BaseComponent {
   }
 
   _resolvePossibleFunction(arg) {
-    return typeof arg === 'function' ? arg.call(this._element) : arg
+    return execute(arg, [this._element])
   }
 
   _getPopperConfig(attachment) {
@@ -438,7 +436,7 @@ class Tooltip extends BaseComponent {
 
     return {
       ...defaultBsPopperConfig,
-      ...(typeof this._config.popperConfig === 'function' ? this._config.popperConfig(defaultBsPopperConfig) : this._config.popperConfig)
+      ...execute(this._config.popperConfig, [defaultBsPopperConfig])
     }
   }
 
@@ -579,9 +577,9 @@ class Tooltip extends BaseComponent {
   _getDelegateConfig() {
     const config = {}
 
-    for (const key in this._config) {
-      if (this.constructor.Default[key] !== this._config[key]) {
-        config[key] = this._config[key]
+    for (const [key, value] of Object.entries(this._config)) {
+      if (this.constructor.Default[key] !== value) {
+        config[key] = value
       }
     }
 
diff --git a/js/src/util/backdrop.js b/js/src/util/backdrop.js
index 78279e056..ee560b85e 100644
--- a/js/src/util/backdrop.js
+++ b/js/src/util/backdrop.js
@@ -5,9 +5,9 @@
  * --------------------------------------------------------------------------
  */
 
-import EventHandler from '../dom/event-handler'
-import { execute, executeAfterTransition, getElement, reflow } from './index'
-import Config from './config'
+import EventHandler from '../dom/event-handler.js'
+import { execute, executeAfterTransition, getElement, reflow } from './index.js'
+import Config from './config.js'
 
 /**
  * Constants
diff --git a/js/src/util/component-functions.js b/js/src/util/component-functions.js
index c2f99cceb..15f2f8c52 100644
--- a/js/src/util/component-functions.js
+++ b/js/src/util/component-functions.js
@@ -5,8 +5,9 @@
  * --------------------------------------------------------------------------
  */
 
-import EventHandler from '../dom/event-handler'
-import { getElementFromSelector, isDisabled } from './index'
+import EventHandler from '../dom/event-handler.js'
+import { isDisabled } from './index.js'
+import SelectorEngine from '../dom/selector-engine.js'
 
 const enableDismissTrigger = (component, method = 'hide') => {
   const clickEvent = `click.dismiss${component.EVENT_KEY}`
@@ -21,7 +22,7 @@ const enableDismissTrigger = (component, method = 'hide') => {
       return
     }
 
-    const target = getElementFromSelector(this) || this.closest(`.${name}`)
+    const target = SelectorEngine.getElementFromSelector(this) || this.closest(`.${name}`)
     const instance = component.getOrCreateInstance(target)
 
     // Method argument is left, for Alert and only, as it doesn't implement the 'hide' method
diff --git a/js/src/util/config.js b/js/src/util/config.js
index 1205905f7..a37fe52a1 100644
--- a/js/src/util/config.js
+++ b/js/src/util/config.js
@@ -5,8 +5,8 @@
  * --------------------------------------------------------------------------
  */
 
-import { isElement, toType } from './index'
-import Manipulator from '../dom/manipulator'
+import { isElement, toType } from './index.js'
+import Manipulator from '../dom/manipulator.js'
 
 /**
  * Class definition
@@ -49,8 +49,7 @@ class Config {
   }
 
   _typeCheckConfig(config, configTypes = this.constructor.DefaultType) {
-    for (const property of Object.keys(configTypes)) {
-      const expectedTypes = configTypes[property]
+    for (const [property, expectedTypes] of Object.entries(configTypes)) {
       const value = config[property]
       const valueType = isElement(value) ? 'element' : toType(value)
 
diff --git a/js/src/util/focustrap.js b/js/src/util/focustrap.js
index ef6916679..1736c4f7c 100644
--- a/js/src/util/focustrap.js
+++ b/js/src/util/focustrap.js
@@ -5,9 +5,9 @@
  * --------------------------------------------------------------------------
  */
 
-import EventHandler from '../dom/event-handler'
-import SelectorEngine from '../dom/selector-engine'
-import Config from './config'
+import EventHandler from '../dom/event-handler.js'
+import SelectorEngine from '../dom/selector-engine.js'
+import Config from './config.js'
 
 /**
  * Constants
diff --git a/js/src/util/index.js b/js/src/util/index.js
index 297e57149..77de14d3a 100644
--- a/js/src/util/index.js
+++ b/js/src/util/index.js
@@ -9,6 +9,20 @@ const MAX_UID = 1_000_000
 const MILLISECONDS_MULTIPLIER = 1000
 const TRANSITION_END = 'transitionend'
 
+/**
+ * Properly escape IDs selectors to handle weird IDs
+ * @param {string} selector
+ * @returns {string}
+ */
+const parseSelector = selector => {
+  if (selector && window.CSS && window.CSS.escape) {
+    // document.querySelector needs escaping to handle IDs (html5+) containing for instance /
+    selector = selector.replace(/#([^\s"#']+)/g, (match, id) => `#${CSS.escape(id)}`)
+  }
+
+  return selector
+}
+
 // Shout-out Angus Croll (https://goo.gl/pxwQGp)
 const toType = object => {
   if (object === null || object === undefined) {
@@ -30,47 +44,6 @@ const getUID = prefix => {
   return prefix
 }
 
-const getSelector = element => {
-  let selector = element.getAttribute('data-bs-target')
-
-  if (!selector || selector === '#') {
-    let hrefAttribute = element.getAttribute('href')
-
-    // The only valid content that could double as a selector are IDs or classes,
-    // so everything starting with `#` or `.`. If a "real" URL is used as the selector,
-    // `document.querySelector` will rightfully complain it is invalid.
-    // See https://github.com/twbs/bootstrap/issues/32273
-    if (!hrefAttribute || (!hrefAttribute.includes('#') && !hrefAttribute.startsWith('.'))) {
-      return null
-    }
-
-    // Just in case some CMS puts out a full URL with the anchor appended
-    if (hrefAttribute.includes('#') && !hrefAttribute.startsWith('#')) {
-      hrefAttribute = `#${hrefAttribute.split('#')[1]}`
-    }
-
-    selector = hrefAttribute && hrefAttribute !== '#' ? hrefAttribute.trim() : null
-  }
-
-  return selector
-}
-
-const getSelectorFromElement = element => {
-  const selector = getSelector(element)
-
-  if (selector) {
-    return document.querySelector(selector) ? selector : null
-  }
-
-  return null
-}
-
-const getElementFromSelector = element => {
-  const selector = getSelector(element)
-
-  return selector ? document.querySelector(selector) : null
-}
-
 const getTransitionDurationFromElement = element => {
   if (!element) {
     return 0
@@ -117,7 +90,7 @@ const getElement = object => {
   }
 
   if (typeof object === 'string' && object.length > 0) {
-    return document.querySelector(object)
+    return document.querySelector(parseSelector(object))
   }
 
   return null
@@ -249,10 +222,8 @@ const defineJQueryPlugin = plugin => {
   })
 }
 
-const execute = callback => {
-  if (typeof callback === 'function') {
-    callback()
-  }
+const execute = (possibleCallback, args = [], defaultValue = possibleCallback) => {
+  return typeof possibleCallback === 'function' ? possibleCallback(...args) : defaultValue
 }
 
 const executeAfterTransition = (callback, transitionElement, waitForTransition = true) => {
@@ -318,10 +289,8 @@ export {
   executeAfterTransition,
   findShadowRoot,
   getElement,
-  getElementFromSelector,
   getjQuery,
   getNextActiveElement,
-  getSelectorFromElement,
   getTransitionDurationFromElement,
   getUID,
   isDisabled,
@@ -330,6 +299,7 @@ export {
   isVisible,
   noop,
   onDOMContentLoaded,
+  parseSelector,
   reflow,
   triggerTransitionEnd,
   toType
diff --git a/js/src/util/scrollbar.js b/js/src/util/scrollbar.js
index 5cac7b6d1..f6bd9de31 100644
--- a/js/src/util/scrollbar.js
+++ b/js/src/util/scrollbar.js
@@ -5,9 +5,9 @@
  * --------------------------------------------------------------------------
  */
 
-import SelectorEngine from '../dom/selector-engine'
-import Manipulator from '../dom/manipulator'
-import { isElement } from './index'
+import SelectorEngine from '../dom/selector-engine.js'
+import Manipulator from '../dom/manipulator.js'
+import { isElement } from './index.js'
 
 /**
  * Constants
diff --git a/js/src/util/swipe.js b/js/src/util/swipe.js
index 7126360ce..fe04a2437 100644
--- a/js/src/util/swipe.js
+++ b/js/src/util/swipe.js
@@ -5,9 +5,9 @@
  * --------------------------------------------------------------------------
  */
 
-import Config from './config'
-import EventHandler from '../dom/event-handler'
-import { execute } from './index'
+import Config from './config.js'
+import EventHandler from '../dom/event-handler.js'
+import { execute } from './index.js'
 
 /**
  * Constants
diff --git a/js/src/util/template-factory.js b/js/src/util/template-factory.js
index cf402fa3b..5046f0e31 100644
--- a/js/src/util/template-factory.js
+++ b/js/src/util/template-factory.js
@@ -5,10 +5,10 @@
  * --------------------------------------------------------------------------
  */
 
-import { DefaultAllowlist, sanitizeHtml } from './sanitizer'
-import { getElement, isElement } from '../util/index'
-import SelectorEngine from '../dom/selector-engine'
-import Config from './config'
+import { DefaultAllowlist, sanitizeHtml } from './sanitizer.js'
+import { execute, getElement, isElement } from './index.js'
+import SelectorEngine from '../dom/selector-engine.js'
+import Config from './config.js'
 
 /**
  * Constants
@@ -143,7 +143,7 @@ class TemplateFactory extends Config {
   }
 
   _resolvePossibleFunction(arg) {
-    return typeof arg === 'function' ? arg(this) : arg
+    return execute(arg, [this])
   }
 
   _putElementInTemplate(element, templateElement) {
diff --git a/js/tests/karma.conf.js b/js/tests/karma.conf.js
index 6636ff15d..11c6f3045 100644
--- a/js/tests/karma.conf.js
+++ b/js/tests/karma.conf.js
@@ -105,7 +105,7 @@ if (BROWSERSTACK) {
   config.browserStack = {
     username: ENV.BROWSER_STACK_USERNAME,
     accessKey: ENV.BROWSER_STACK_ACCESS_KEY,
-    build: `bootstrap-${ENV.GITHUB_SHA ? ENV.GITHUB_SHA.slice(0, 7) + '-' : ''}${new Date().toISOString()}`,
+    build: `bootstrap-${ENV.GITHUB_SHA ? `${ENV.GITHUB_SHA.slice(0, 7)}-` : ''}${new Date().toISOString()}`,
     project: 'Bootstrap',
     retryLimit: 2
   }
diff --git a/js/tests/unit/collapse.spec.js b/js/tests/unit/collapse.spec.js
index 9c8671988..fa50ad361 100644
--- a/js/tests/unit/collapse.spec.js
+++ b/js/tests/unit/collapse.spec.js
@@ -278,14 +278,14 @@ describe('Collapse', () => {
         fixtureEl.innerHTML = [
           '<div id="parentGroup" class="accordion">',
           '  <div id="parentHeader" class="accordion-header">',
-          '    <button data-bs-target="#parentContent" data-bs-toggle="collapse" role="button" class="accordion-toggle">Parent</button>',
+          '    <button data-bs-target="#parentContent" data-bs-toggle="collapse" class="accordion-toggle">Parent</button>',
           '  </div>',
           '  <div id="parentContent" class="accordion-collapse collapse" aria-labelledby="parentHeader" data-bs-parent="#parentGroup">',
           '    <div class="accordion-body">',
           '      <div id="childGroup" class="accordion">',
           '        <div class="accordion-item">',
           '          <div id="childHeader1" class="accordion-header">',
-          '            <button data-bs-target="#childContent1" data-bs-toggle="collapse" role="button" class="accordion-toggle">Child 1</button>',
+          '            <button data-bs-target="#childContent1" data-bs-toggle="collapse" class="accordion-toggle">Child 1</button>',
           '          </div>',
           '          <div id="childContent1" class="accordion-collapse collapse" aria-labelledby="childHeader1" data-bs-parent="#childGroup">',
           '            <div>content</div>',
@@ -293,7 +293,7 @@ describe('Collapse', () => {
           '        </div>',
           '        <div class="accordion-item">',
           '          <div id="childHeader2" class="accordion-header">',
-          '            <button data-bs-target="#childContent2" data-bs-toggle="collapse" role="button" class="accordion-toggle">Child 2</button>',
+          '            <button data-bs-target="#childContent2" data-bs-toggle="collapse" class="accordion-toggle">Child 2</button>',
           '          </div>',
           '          <div id="childContent2" class="accordion-collapse collapse" aria-labelledby="childHeader2" data-bs-parent="#childGroup">',
           '            <div>content</div>',
@@ -887,17 +887,17 @@ describe('Collapse', () => {
       return new Promise(resolve => {
         fixtureEl.innerHTML = [
           '<a id="trigger1" role="button" data-bs-toggle="collapse" href="#test1"></a>',
-          '<a id="trigger2" role="button" data-bs-toggle="collapse" href="#test2"></a>',
+          '<a id="trigger2" role="button" data-bs-toggle="collapse" href="#0/my/id"></a>',
           '<a id="trigger3" role="button" data-bs-toggle="collapse" href=".multi"></a>',
           '<div id="test1" class="multi"></div>',
-          '<div id="test2" class="multi"></div>'
+          '<div id="0/my/id" class="multi"></div>'
         ].join('')
 
         const trigger1 = fixtureEl.querySelector('#trigger1')
         const trigger2 = fixtureEl.querySelector('#trigger2')
         const trigger3 = fixtureEl.querySelector('#trigger3')
         const target1 = fixtureEl.querySelector('#test1')
-        const target2 = fixtureEl.querySelector('#test2')
+        const target2 = fixtureEl.querySelector(`#${CSS.escape('0/my/id')}`)
 
         const target2Shown = () => {
           expect(trigger1).not.toHaveClass('collapsed')
diff --git a/js/tests/unit/dom/selector-engine.spec.js b/js/tests/unit/dom/selector-engine.spec.js
index 0245896c6..905e25bae 100644
--- a/js/tests/unit/dom/selector-engine.spec.js
+++ b/js/tests/unit/dom/selector-engine.spec.js
@@ -1,5 +1,5 @@
 import SelectorEngine from '../../../src/dom/selector-engine'
-import { getFixture, clearFixture } from '../../helpers/fixture'
+import { clearFixture, getFixture } from '../../helpers/fixture'
 
 describe('SelectorEngine', () => {
   let fixtureEl
@@ -232,5 +232,159 @@ describe('SelectorEngine', () => {
       expect(SelectorEngine.focusableChildren(fixtureEl)).toEqual(expectedElements)
     })
   })
-})
 
+  describe('getSelectorFromElement', () => {
+    it('should get selector from data-bs-target', () => {
+      fixtureEl.innerHTML = [
+        '<div id="test" data-bs-target=".target"></div>',
+        '<div class="target"></div>'
+      ].join('')
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(SelectorEngine.getSelectorFromElement(testEl)).toEqual('.target')
+    })
+
+    it('should get selector from href if no data-bs-target set', () => {
+      fixtureEl.innerHTML = [
+        '<a id="test" href=".target"></a>',
+        '<div class="target"></div>'
+      ].join('')
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(SelectorEngine.getSelectorFromElement(testEl)).toEqual('.target')
+    })
+
+    it('should get selector from href if data-bs-target equal to #', () => {
+      fixtureEl.innerHTML = [
+        '<a id="test" data-bs-target="#" href=".target"></a>',
+        '<div class="target"></div>'
+      ].join('')
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(SelectorEngine.getSelectorFromElement(testEl)).toEqual('.target')
+    })
+
+    it('should return null if a selector from a href is a url without an anchor', () => {
+      fixtureEl.innerHTML = [
+        '<a id="test" data-bs-target="#" href="foo/bar.html"></a>',
+        '<div class="target"></div>'
+      ].join('')
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(SelectorEngine.getSelectorFromElement(testEl)).toBeNull()
+    })
+
+    it('should return the anchor if a selector from a href is a url', () => {
+      fixtureEl.innerHTML = [
+        '<a id="test" data-bs-target="#" href="foo/bar.html#target"></a>',
+        '<div id="target"></div>'
+      ].join('')
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(SelectorEngine.getSelectorFromElement(testEl)).toEqual('#target')
+    })
+
+    it('should return null if selector not found', () => {
+      fixtureEl.innerHTML = '<a id="test" href=".target"></a>'
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(SelectorEngine.getSelectorFromElement(testEl)).toBeNull()
+    })
+
+    it('should return null if no selector', () => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const testEl = fixtureEl.querySelector('div')
+
+      expect(SelectorEngine.getSelectorFromElement(testEl)).toBeNull()
+    })
+  })
+
+  describe('getElementFromSelector', () => {
+    it('should get element from data-bs-target', () => {
+      fixtureEl.innerHTML = [
+        '<div id="test" data-bs-target=".target"></div>',
+        '<div class="target"></div>'
+      ].join('')
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(SelectorEngine.getElementFromSelector(testEl)).toEqual(fixtureEl.querySelector('.target'))
+    })
+
+    it('should get element from href if no data-bs-target set', () => {
+      fixtureEl.innerHTML = [
+        '<a id="test" href=".target"></a>',
+        '<div class="target"></div>'
+      ].join('')
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(SelectorEngine.getElementFromSelector(testEl)).toEqual(fixtureEl.querySelector('.target'))
+    })
+
+    it('should return null if element not found', () => {
+      fixtureEl.innerHTML = '<a id="test" href=".target"></a>'
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(SelectorEngine.getElementFromSelector(testEl)).toBeNull()
+    })
+
+    it('should return null if no selector', () => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const testEl = fixtureEl.querySelector('div')
+
+      expect(SelectorEngine.getElementFromSelector(testEl)).toBeNull()
+    })
+  })
+
+  describe('getMultipleElementsFromSelector', () => {
+    it('should get elements from data-bs-target', () => {
+      fixtureEl.innerHTML = [
+        '<div id="test" data-bs-target=".target"></div>',
+        '<div class="target"></div>',
+        '<div class="target"></div>'
+      ].join('')
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(SelectorEngine.getMultipleElementsFromSelector(testEl)).toEqual(Array.from(fixtureEl.querySelectorAll('.target')))
+    })
+
+    it('should get elements in array, from href if no data-bs-target set', () => {
+      fixtureEl.innerHTML = [
+        '<a id="test" href=".target"></a>',
+        '<div class="target"></div>',
+        '<div class="target"></div>'
+      ].join('')
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(SelectorEngine.getMultipleElementsFromSelector(testEl)).toEqual(Array.from(fixtureEl.querySelectorAll('.target')))
+    })
+
+    it('should return empty array if elements not found', () => {
+      fixtureEl.innerHTML = '<a id="test" href=".target"></a>'
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(SelectorEngine.getMultipleElementsFromSelector(testEl)).toHaveSize(0)
+    })
+
+    it('should return empty array if no selector', () => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const testEl = fixtureEl.querySelector('div')
+
+      expect(SelectorEngine.getMultipleElementsFromSelector(testEl)).toHaveSize(0)
+    })
+  })
+})
diff --git a/js/tests/unit/tab.spec.js b/js/tests/unit/tab.spec.js
index e0c7d86a6..1ac5929e1 100644
--- a/js/tests/unit/tab.spec.js
+++ b/js/tests/unit/tab.spec.js
@@ -177,6 +177,43 @@ describe('Tab', () => {
       })
     })
 
+    it('should work with tab id being an int', done => {
+      fixtureEl.innerHTML = [
+        '<div class="card-header d-block d-inline-block">',
+        '  <ul class="nav nav-tabs card-header-tabs" id="page_tabs">',
+        '    <li class="nav-item">',
+        '      <a class="nav-link" draggable="false" data-toggle="tab" href="#tab1">',
+        '        Working Tab 1 (#tab1)',
+        '     </a>',
+        '    </li>',
+        '    <li class="nav-item">',
+        '      <a id="trigger2" class="nav-link" draggable="false" data-toggle="tab" href="#2">',
+        '        Tab with numeric ID should work (#2)',
+        '      </a>',
+        '    </li>',
+        '  </ul>',
+        '</div>',
+        '<div class="card-body">',
+        '  <div class="tab-content" id="page_content">',
+        '     <div class="tab-pane fade" id="tab1">',
+        '      Working Tab 1 (#tab1) Content Here',
+        '  </div>',
+        '  <div class="tab-pane fade" id="2">',
+        '      Working Tab 2 (#2) with numeric ID',
+        '  </div>',
+        '</div>'
+      ].join('')
+      const profileTriggerEl = fixtureEl.querySelector('#trigger2')
+      const tab = new Tab(profileTriggerEl)
+
+      profileTriggerEl.addEventListener('shown.bs.tab', () => {
+        expect(fixtureEl.querySelector(`#${CSS.escape('2')}`)).toHaveClass('active')
+        done()
+      })
+
+      tab.show()
+    })
+
     it('should not fire shown when show is prevented', () => {
       return new Promise((resolve, reject) => {
         fixtureEl.innerHTML = '<div class="nav"><div class="nav-link"></div></div>'
@@ -603,19 +640,19 @@ describe('Tab', () => {
         '</div>'
       ].join('')
 
-      const tabEl = fixtureEl.querySelector('#tab1')
+      const tabEl1 = fixtureEl.querySelector('#tab1')
       const tabEl2 = fixtureEl.querySelector('#tab2')
       const tabEl3 = fixtureEl.querySelector('#tab3')
       const tabEl4 = fixtureEl.querySelector('#tab4')
-      const tab = new Tab(tabEl)
+      const tab1 = new Tab(tabEl1)
       const tab2 = new Tab(tabEl2)
       const tab3 = new Tab(tabEl3)
       const tab4 = new Tab(tabEl4)
-      const spy1 = spyOn(tab, 'show').and.callThrough()
+      const spy1 = spyOn(tab1, 'show').and.callThrough()
       const spy2 = spyOn(tab2, 'show').and.callThrough()
       const spy3 = spyOn(tab3, 'show').and.callThrough()
       const spy4 = spyOn(tab4, 'show').and.callThrough()
-      const spyFocus1 = spyOn(tabEl, 'focus').and.callThrough()
+      const spyFocus1 = spyOn(tabEl1, 'focus').and.callThrough()
       const spyFocus2 = spyOn(tabEl2, 'focus').and.callThrough()
       const spyFocus3 = spyOn(tabEl3, 'focus').and.callThrough()
       const spyFocus4 = spyOn(tabEl4, 'focus').and.callThrough()
@@ -623,7 +660,7 @@ describe('Tab', () => {
       const keydown = createEvent('keydown')
       keydown.key = 'ArrowRight'
 
-      tabEl.dispatchEvent(keydown)
+      tabEl1.dispatchEvent(keydown)
       expect(spy1).not.toHaveBeenCalled()
       expect(spy2).not.toHaveBeenCalled()
       expect(spy3).not.toHaveBeenCalled()
@@ -644,19 +681,19 @@ describe('Tab', () => {
         '</div>'
       ].join('')
 
-      const tabEl = fixtureEl.querySelector('#tab1')
+      const tabEl1 = fixtureEl.querySelector('#tab1')
       const tabEl2 = fixtureEl.querySelector('#tab2')
       const tabEl3 = fixtureEl.querySelector('#tab3')
       const tabEl4 = fixtureEl.querySelector('#tab4')
-      const tab = new Tab(tabEl)
+      const tab1 = new Tab(tabEl1)
       const tab2 = new Tab(tabEl2)
       const tab3 = new Tab(tabEl3)
       const tab4 = new Tab(tabEl4)
-      const spy1 = spyOn(tab, 'show').and.callThrough()
+      const spy1 = spyOn(tab1, 'show').and.callThrough()
       const spy2 = spyOn(tab2, 'show').and.callThrough()
       const spy3 = spyOn(tab3, 'show').and.callThrough()
       const spy4 = spyOn(tab4, 'show').and.callThrough()
-      const spyFocus1 = spyOn(tabEl, 'focus').and.callThrough()
+      const spyFocus1 = spyOn(tabEl1, 'focus').and.callThrough()
       const spyFocus2 = spyOn(tabEl2, 'focus').and.callThrough()
       const spyFocus3 = spyOn(tabEl3, 'focus').and.callThrough()
       const spyFocus4 = spyOn(tabEl4, 'focus').and.callThrough()
diff --git a/js/tests/unit/util/config.spec.js b/js/tests/unit/util/config.spec.js
index e1693c0c1..0037e09d7 100644
--- a/js/tests/unit/util/config.spec.js
+++ b/js/tests/unit/util/config.spec.js
@@ -128,7 +128,7 @@ describe('Config', () => {
       const obj = new DummyConfigClass()
       expect(() => {
         obj._typeCheckConfig(config)
-      }).toThrowError(TypeError, obj.constructor.NAME.toUpperCase() + ': Option "parent" provided type "number" but expected type "(string|element)".')
+      }).toThrowError(TypeError, `${obj.constructor.NAME.toUpperCase()}: Option "parent" provided type "number" but expected type "(string|element)".`)
     })
 
     it('should return null stringified when null is passed', () => {
diff --git a/js/tests/unit/util/index.spec.js b/js/tests/unit/util/index.spec.js
index 9f28ce0aa..202c72061 100644
--- a/js/tests/unit/util/index.spec.js
+++ b/js/tests/unit/util/index.spec.js
@@ -22,119 +22,6 @@ describe('Util', () => {
     })
   })
 
-  describe('getSelectorFromElement', () => {
-    it('should get selector from data-bs-target', () => {
-      fixtureEl.innerHTML = [
-        '<div id="test" data-bs-target=".target"></div>',
-        '<div class="target"></div>'
-      ].join('')
-
-      const testEl = fixtureEl.querySelector('#test')
-
-      expect(Util.getSelectorFromElement(testEl)).toEqual('.target')
-    })
-
-    it('should get selector from href if no data-bs-target set', () => {
-      fixtureEl.innerHTML = [
-        '<a id="test" href=".target"></a>',
-        '<div class="target"></div>'
-      ].join('')
-
-      const testEl = fixtureEl.querySelector('#test')
-
-      expect(Util.getSelectorFromElement(testEl)).toEqual('.target')
-    })
-
-    it('should get selector from href if data-bs-target equal to #', () => {
-      fixtureEl.innerHTML = [
-        '<a id="test" data-bs-target="#" href=".target"></a>',
-        '<div class="target"></div>'
-      ].join('')
-
-      const testEl = fixtureEl.querySelector('#test')
-
-      expect(Util.getSelectorFromElement(testEl)).toEqual('.target')
-    })
-
-    it('should return null if a selector from a href is a url without an anchor', () => {
-      fixtureEl.innerHTML = [
-        '<a id="test" data-bs-target="#" href="foo/bar.html"></a>',
-        '<div class="target"></div>'
-      ].join('')
-
-      const testEl = fixtureEl.querySelector('#test')
-
-      expect(Util.getSelectorFromElement(testEl)).toBeNull()
-    })
-
-    it('should return the anchor if a selector from a href is a url', () => {
-      fixtureEl.innerHTML = [
-        '<a id="test" data-bs-target="#" href="foo/bar.html#target"></a>',
-        '<div id="target"></div>'
-      ].join('')
-
-      const testEl = fixtureEl.querySelector('#test')
-
-      expect(Util.getSelectorFromElement(testEl)).toEqual('#target')
-    })
-
-    it('should return null if selector not found', () => {
-      fixtureEl.innerHTML = '<a id="test" href=".target"></a>'
-
-      const testEl = fixtureEl.querySelector('#test')
-
-      expect(Util.getSelectorFromElement(testEl)).toBeNull()
-    })
-
-    it('should return null if no selector', () => {
-      fixtureEl.innerHTML = '<div></div>'
-
-      const testEl = fixtureEl.querySelector('div')
-
-      expect(Util.getSelectorFromElement(testEl)).toBeNull()
-    })
-  })
-
-  describe('getElementFromSelector', () => {
-    it('should get element from data-bs-target', () => {
-      fixtureEl.innerHTML = [
-        '<div id="test" data-bs-target=".target"></div>',
-        '<div class="target"></div>'
-      ].join('')
-
-      const testEl = fixtureEl.querySelector('#test')
-
-      expect(Util.getElementFromSelector(testEl)).toEqual(fixtureEl.querySelector('.target'))
-    })
-
-    it('should get element from href if no data-bs-target set', () => {
-      fixtureEl.innerHTML = [
-        '<a id="test" href=".target"></a>',
-        '<div class="target"></div>'
-      ].join('')
-
-      const testEl = fixtureEl.querySelector('#test')
-
-      expect(Util.getElementFromSelector(testEl)).toEqual(fixtureEl.querySelector('.target'))
-    })
-
-    it('should return null if element not found', () => {
-      fixtureEl.innerHTML = '<a id="test" href=".target"></a>'
-
-      const testEl = fixtureEl.querySelector('#test')
-
-      expect(Util.getElementFromSelector(testEl)).toBeNull()
-    })
-
-    it('should return null if no selector', () => {
-      fixtureEl.innerHTML = '<div></div>'
-
-      const testEl = fixtureEl.querySelector('div')
-
-      expect(Util.getElementFromSelector(testEl)).toBeNull()
-    })
-  })
-
   describe('getTransitionDurationFromElement', () => {
     it('should get transition from element', () => {
       fixtureEl.innerHTML = '<div style="transition: all 300ms ease-out;"></div>'
@@ -631,6 +518,25 @@ describe('Util', () => {
       Util.execute(spy)
       expect(spy).toHaveBeenCalled()
     })
+
+    it('should execute if arg is function & return the result', () => {
+      const functionFoo = (num1, num2 = 10) => num1 + num2
+      const resultFoo = Util.execute(functionFoo, [4, 5])
+      expect(resultFoo).toBe(9)
+
+      const resultFoo1 = Util.execute(functionFoo, [4])
+      expect(resultFoo1).toBe(14)
+
+      const functionBar = () => 'foo'
+      const resultBar = Util.execute(functionBar)
+      expect(resultBar).toBe('foo')
+    })
+
+    it('should not execute if arg is not function & return default argument', () => {
+      const foo = 'bar'
+      expect(Util.execute(foo)).toBe('bar')
+      expect(Util.execute(foo, [], 4)).toBe(4)
+    })
   })
 
   describe('executeAfterTransition', () => {
diff --git a/js/tests/visual/button.html b/js/tests/visual/button.html
index 0c54934f0..47c50889c 100644
--- a/js/tests/visual/button.html
+++ b/js/tests/visual/button.html
@@ -15,7 +15,7 @@
       </button>
 
       <p>For checkboxes and radio buttons, ensure that keyboard behavior is functioning correctly.</p>
-      <p>Navigate to the checkboxes with the keyboard (generally, using <kbd>TAB</kbd> / <kbd>SHIFT + TAB</kbd>), and ensure that <kbd>SPACE</kbd> toggles the currently focused checkbox. Click on one of the checkboxes using the mouse, ensure that focus was correctly set on the actual checkbox, and that <kbd>SPACE</kbd> toggles the checkbox again.</p>
+      <p>Navigate to the checkboxes with the keyboard (generally, using <kbd>Tab</kbd> / <kbd><kbd>Shift</kbd> + <kbd>Tab</kbd></kbd>), and ensure that <kbd>Space</kbd> toggles the currently focused checkbox. Click on one of the checkboxes using the mouse, ensure that focus was correctly set on the actual checkbox, and that <kbd>Space</kbd> toggles the checkbox again.</p>
 
       <div class="btn-group" data-bs-toggle="buttons">
         <label class="btn btn-primary active">
@@ -29,7 +29,7 @@
         </label>
       </div>
 
-      <p>Navigate to the radio button group with the keyboard (generally, using <kbd>TAB</kbd> / <kbd>SHIFT + TAB</kbd>). If no radio button was initially set to be selected, the first/last radio button should receive focus (depending on whether you navigated "forward" to the group with <kbd>TAB</kbd> or "backwards" using <kbd>SHIFT + TAB</kbd>). If a radio button was already selected, navigating with the keyboard should set focus to that particular radio button. Only one radio button in a group should receive focus at any given time.  Ensure that the selected radio button can be changed by using the <kbd>←</kbd> and <kbd>→</kbd> arrow keys. Click on one of the radio buttons with the mouse,  ensure that focus was correctly set on the actual radio button, and that <kbd>←</kbd> and <kbd>→</kbd> change the selected radio button again.</p>
+      <p>Navigate to the radio button group with the keyboard (generally, using <kbd>Tab</kbd> / <kbd><kbd>Shift</kbd> + <kbd>Tab</kbd></kbd>). If no radio button was initially set to be selected, the first/last radio button should receive focus (depending on whether you navigated "forward" to the group with <kbd>Tab</kbd> or "backwards" using <kbd><kbd>Shift</kbd> + <kbd>Tab</kbd></kbd>). If a radio button was already selected, navigating with the keyboard should set focus to that particular radio button. Only one radio button in a group should receive focus at any given time.  Ensure that the selected radio button can be changed by using the <kbd>←</kbd> and <kbd>→</kbd> arrow keys. Click on one of the radio buttons with the mouse,  ensure that focus was correctly set on the actual radio button, and that <kbd>←</kbd> and <kbd>→</kbd> change the selected radio button again.</p>
 
       <div class="btn-group" data-bs-toggle="buttons">
         <label class="btn btn-primary active">
diff --git a/js/tests/visual/carousel.html b/js/tests/visual/carousel.html
index 153c86604..1b2de5291 100644
--- a/js/tests/visual/carousel.html
+++ b/js/tests/visual/carousel.html
@@ -55,7 +55,7 @@
       // Test to show that transition-duration can be changed with css
       carousel.addEventListener('slid.bs.carousel', event => {
         t1 = performance.now()
-        console.log('transition-duration took ' + (t1 - t0) + 'ms, slid at ' + event.timeStamp)
+        console.log(`transition-duration took ${t1 - t0}ms, slid at ${event.timeStamp}`)
       })
       carousel.addEventListener('slide.bs.carousel', () => {
         t0 = performance.now()
diff --git a/js/tests/visual/modal.html b/js/tests/visual/modal.html
index b738d9e81..09d42333d 100644
--- a/js/tests/visual/modal.html
+++ b/js/tests/visual/modal.html
@@ -264,7 +264,7 @@
 
       slowModal.addEventListener('shown.bs.modal', () => {
         t1 = performance.now()
-        console.log('transition-duration took ' + (t1 - t0) + 'ms.')
+        console.log(`transition-duration took ${t1 - t0}ms.`)
       })
 
       slowModal.addEventListener('show.bs.modal', () => {