Cache a few variables.

4 files changed, 12 insertions, 9 deletions

diff --git a/js/src/button.js b/js/src/button.js
index b244c8df4..d79378582 100644
--- a/js/src/button.js
+++ b/js/src/button.js
@@ -111,11 +111,12 @@ class Button {
 
   static _jQueryInterface(config) {
     return this.each(function () {
-      let data = $(this).data(DATA_KEY)
+      const $element = $(this)
+      let data = $element.data(DATA_KEY)
 
       if (!data) {
         data = new Button(this)
-        $(this).data(DATA_KEY, data)
+        $element.data(DATA_KEY, data)
       }
 
       if (config === 'toggle') {
diff --git a/js/src/carousel.js b/js/src/carousel.js
index 8c03818ab..62b4ce1e4 100644
--- a/js/src/carousel.js
+++ b/js/src/carousel.js
@@ -129,10 +129,11 @@ class Carousel {
   }
 
   nextWhenVisible() {
+    const $element = $(this._element)
     // Don't call next when the page isn't visible
     // or the carousel or its parent isn't visible
     if (!document.hidden &&
-      ($(this._element).is(':visible') && $(this._element).css('visibility') !== 'hidden')) {
+      ($element.is(':visible') && $element.css('visibility') !== 'hidden')) {
       this.next()
     }
   }
diff --git a/js/src/collapse.js b/js/src/collapse.js
index 04653b835..605299515 100644
--- a/js/src/collapse.js
+++ b/js/src/collapse.js
@@ -324,11 +324,11 @@ class Collapse {
 
   static _jQueryInterface(config) {
     return this.each(function () {
-      const $this = $(this)
-      let data = $this.data(DATA_KEY)
+      const $element = $(this)
+      let data = $element.data(DATA_KEY)
       const _config = {
         ...Default,
-        ...$this.data(),
+        ...$element.data(),
         ...typeof config === 'object' && config ? config : {}
       }
 
@@ -338,7 +338,7 @@ class Collapse {
 
       if (!data) {
         data = new Collapse(this, _config)
-        $this.data(DATA_KEY, data)
+        $element.data(DATA_KEY, data)
       }
 
       if (typeof config === 'string') {
diff --git a/js/src/tooltip.js b/js/src/tooltip.js
index a1ce7ca87..e2a554014 100644
--- a/js/src/tooltip.js
+++ b/js/src/tooltip.js
@@ -735,7 +735,8 @@ class Tooltip {
 
   static _jQueryInterface(config) {
     return this.each(function () {
-      let data = $(this).data(DATA_KEY)
+      const $element = $(this)
+      let data = $element.data(DATA_KEY)
       const _config = typeof config === 'object' && config
 
       if (!data && /dispose|hide/.test(config)) {
@@ -744,7 +745,7 @@ class Tooltip {
 
       if (!data) {
         data = new Tooltip(this, _config)
-        $(this).data(DATA_KEY, data)
+        $element.data(DATA_KEY, data)
       }
 
       if (typeof config === 'string') {