Add function type for `popperConfig` option (#32882)

* Add function type for `popperConfig` option

* Update .bundlewatch.config.json

* copy edits

Co-authored-by: XhmikosR <xhmikosr@gmail.com>
Co-authored-by: Mark Otto <markdotto@gmail.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/js/src/dropdown.js b/js/src/dropdown.js
index 878a5a9a21..7221debfc2 100644
--- a/js/src/dropdown.js
+++ b/js/src/dropdown.js
@@ -86,7 +86,7 @@ const DefaultType = {
   boundary: '(string|element)',
   reference: '(string|element|object)',
   display: 'string',
-  popperConfig: '(null|object)'
+  popperConfig: '(null|object|function)'
 }
 
 /**
@@ -322,7 +322,7 @@ class Dropdown extends BaseComponent {
   }
 
   _getPopperConfig() {
-    const popperConfig = {
+    const defaultBsPopperConfig = {
       placement: this._getPlacement(),
       modifiers: [{
         name: 'preventOverflow',
@@ -341,15 +341,15 @@ class Dropdown extends BaseComponent {
 
     // Disable Popper if we have a static display
     if (this._config.display === 'static') {
-      popperConfig.modifiers = [{
+      defaultBsPopperConfig.modifiers = [{
         name: 'applyStyles',
         enabled: false
       }]
     }
 
     return {
-      ...popperConfig,
-      ...this._config.popperConfig
+      ...defaultBsPopperConfig,
+      ...(typeof this._config.popperConfig === 'function' ? this._config.popperConfig(defaultBsPopperConfig) : this._config.popperConfig)
     }
   }