V4 dev backports and updates

.babelrc.js

@@ -4,14 +4,11 @@ module.exports = {
       '@babel/preset-env',
       {
         loose: true,
-        modules: false,
-        exclude: ['transform-typeof-symbol']
+        bugfixes: true,
+        modules: false
       }
     ]
   ],
-  plugins: [
-    '@babel/plugin-proposal-object-rest-spread'
-  ],
   env: {
     test: {
       plugins: [ 'istanbul' ]

Gemfile

@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 
 group :development, :test do
-  gem 'jekyll', '~> 4.1.0'
+  gem 'jekyll', '~> 4.1.1'
   gem 'jekyll-redirect-from', '~> 0.16.0'
   gem 'jekyll-sitemap', '~> 1.4.0'
   gem 'jekyll-toc', '~> 0.14.0'

Gemfile.lock

@@ -16,7 +16,7 @@ GEM
     http_parser.rb (0.6.0)
     i18n (1.8.3)
       concurrent-ruby (~> 1.0)
-    jekyll (4.1.0)
+    jekyll (4.1.1)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
@@ -42,7 +42,7 @@ GEM
       nokogiri (~> 1.10)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    kramdown (2.2.1)
+    kramdown (2.3.0)
       rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
@@ -79,7 +79,7 @@ PLATFORMS
   x64-mingw32
 
 DEPENDENCIES
-  jekyll (~> 4.1.0)
+  jekyll (~> 4.1.1)
   jekyll-redirect-from (~> 0.16.0)
   jekyll-sitemap (~> 1.4.0)
   jekyll-toc (~> 0.14.0)

js/src/modal.js

@@ -238,12 +238,25 @@ class Modal {
         return
       }
 
+      const isModalOverflowing = this._element.scrollHeight > document.documentElement.clientHeight
+
+      if (!isModalOverflowing) {
+        this._element.style.overflowY = 'hidden'
+      }
+
       this._element.classList.add(CLASS_NAME_STATIC)
 
-      const modalTransitionDuration = Util.getTransitionDurationFromElement(this._element)
+      const modalTransitionDuration = Util.getTransitionDurationFromElement(this._dialog)
+      $(this._element).off(Util.TRANSITION_END)
 
       $(this._element).one(Util.TRANSITION_END, () => {
         this._element.classList.remove(CLASS_NAME_STATIC)
+        if (!isModalOverflowing) {
+          $(this._element).one(Util.TRANSITION_END, () => {
+            this._element.style.overflowY = ''
+          })
+            .emulateTransitionEnd(this._element, modalTransitionDuration)
+        }
       })
         .emulateTransitionEnd(modalTransitionDuration)
       this._element.focus()

js/tests/browsers.js

@@ -28,7 +28,7 @@ const browsers = {
     os: 'Windows',
     os_version: '10',
     browser: 'Edge',
-    browser_version: 'latest'
+    browser_version: '15'
   },
   ie11Win10: {
     base: 'BrowserStack',

js/tests/unit/modal.js

@@ -959,4 +959,21 @@ $(function () {
         keyboard: false
       })
   })
+
+  QUnit.test('should not overflow when clicking outside of modal-content if backdrop = static', function (assert) {
+    assert.expect(1)
+    var done = assert.async()
+    var $modal = $('<div class="modal" data-backdrop="static"><div class="modal-dialog" style="transition-duration: 20ms;"/></div>').appendTo('#qunit-fixture')
+
+    $modal.on('shown.bs.modal', function () {
+      $modal.trigger('click')
+      setTimeout(function () {
+        assert.strictEqual($modal[0].clientHeight, $modal[0].scrollHeight)
+        done()
+      }, 20)
+    })
+      .bootstrapModal({
+        backdrop: 'static'
+      })
+  })
 })