docs: move color-mode script (#37658)

* docs: move color-mode script

* Move color-modes.js in static folder

* Async load color-modes.js

* Switch to DOMContentLoaded

* Revert async loading

1 files changed, 62 insertions, 0 deletions

diff --git a/site/static/docs/5.2/assets/js/color-modes.js b/site/static/docs/5.2/assets/js/color-modes.js
new file mode 100644
index 000000000..41b6b893e
--- /dev/null
+++ b/site/static/docs/5.2/assets/js/color-modes.js
@@ -0,0 +1,62 @@
+/*!
+ * Color mode toggler for Bootstrap's docs (https://getbootstrap.com/)
+ * Copyright 2011-2022 The Bootstrap Authors
+ * Licensed under the Creative Commons Attribution 3.0 Unported License.
+ */
+
+(() => {
+  'use strict'
+
+  const storedTheme = localStorage.getItem('theme')
+
+  const getPreferredTheme = () => {
+    if (storedTheme) {
+      return storedTheme
+    }
+
+    return window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light'
+  }
+
+  const setTheme = function (theme) {
+    if (theme === 'auto' && window.matchMedia('(prefers-color-scheme: dark)').matches) {
+      document.documentElement.setAttribute('data-bs-theme', 'dark')
+    } else {
+      document.documentElement.setAttribute('data-bs-theme', theme)
+    }
+  }
+
+  setTheme(getPreferredTheme())
+
+  const showActiveTheme = theme => {
+    const activeThemeIcon = document.querySelector('.theme-icon-active use')
+    const btnToActive = document.querySelector(`[data-bs-theme-value="${theme}"]`)
+    const svgOfActiveBtn = btnToActive.querySelector('svg use').getAttribute('href')
+
+    document.querySelectorAll('[data-bs-theme-value]').forEach(element => {
+      element.classList.remove('active')
+    })
+
+    btnToActive.classList.add('active')
+    activeThemeIcon.setAttribute('href', svgOfActiveBtn)
+  }
+
+  window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', () => {
+    if (storedTheme !== 'light' || storedTheme !== 'dark') {
+      setTheme(getPreferredTheme())
+    }
+  })
+
+  window.addEventListener('DOMContentLoaded', () => {
+    showActiveTheme(getPreferredTheme())
+
+    document.querySelectorAll('[data-bs-theme-value]')
+      .forEach(toggle => {
+        toggle.addEventListener('click', () => {
+          const theme = toggle.getAttribute('data-bs-theme-value')
+          localStorage.setItem('theme', theme)
+          setTheme(theme)
+          showActiveTheme(theme)
+        })
+      })
+  })
+})()