Dropdown — Drop `flip` option (#33198)

js/src/dropdown.js

@@ -73,7 +73,6 @@ const PLACEMENT_LEFT = isRTL() ? 'right-start' : 'left-start'
 
 const Default = {
   offset: [0, 2],
-  flip: true,
   boundary: 'clippingParents',
   reference: 'toggle',
   display: 'dynamic',
@@ -82,7 +81,6 @@ const Default = {
 
 const DefaultType = {
   offset: '(array|string|function)',
-  flip: 'boolean',
   boundary: '(string|element)',
   reference: '(string|element|object)',
   display: 'string',
@@ -328,7 +326,6 @@ class Dropdown extends BaseComponent {
       modifiers: [{
         name: 'preventOverflow',
         options: {
-          altBoundary: this._config.flip,
           boundary: this._config.boundary
         }
       },

site/content/docs/5.0/components/dropdowns.md

@@ -979,12 +979,6 @@ Options can be passed via data attributes or JavaScript. For data attributes, ap
     </tr>
   </thead>
   <tbody>
-    <tr>
-      <td><code>flip</code></td>
-      <td>boolean</td>
-      <td><code>true</code></td>
-      <td>Allow Dropdown to flip in case of an overlapping on the reference element. For more information refer to Popper's <a href="https://popper.js.org/docs/v2/modifiers/flip/">flip docs</a>.</td>
-    </tr>
     <tr>
       <td><code>boundary</code></td>
       <td>string | element</td>

site/content/docs/5.0/migration.md

@@ -18,6 +18,8 @@ toc: true
   var dropdown = new bootstrap.Dropdown('[data-bs-toggle="dropdown"]')
   ```
 
+- Dropped `flip` option for dropdown plugin in favor of native popper configuration. You can now disable the flipping behavior by passing an empty array for [`fallbackPlacements`](https://popper.js.org/docs/v2/modifiers/flip/#fallbackplacements) option in [flip](https://popper.js.org/docs/v2/modifiers/flip/) modifier.
+
 ### Utilities
 
 - Dropped the `0` entry in `$border-widths` map to remove the duplicated `.border-0` class.