Always modal scroll top to 0

js/src/modal.js

@@ -60,7 +60,6 @@ const EVENT_MOUSEUP_DISMISS = `mouseup.dismiss${EVENT_KEY}`
 const EVENT_MOUSEDOWN_DISMISS = `mousedown.dismiss${EVENT_KEY}`
 const EVENT_CLICK_DATA_API = `click${EVENT_KEY}${DATA_API_KEY}`
 
-const CLASS_NAME_SCROLLABLE = 'modal-dialog-scrollable'
 const CLASS_NAME_SCROLLBAR_MEASURER = 'modal-scrollbar-measure'
 const CLASS_NAME_BACKDROP = 'modal-backdrop'
 const CLASS_NAME_OPEN = 'modal-open'
@@ -249,11 +248,10 @@ class Modal {
     this._element.style.display = 'block'
     this._element.removeAttribute('aria-hidden')
     this._element.setAttribute('aria-modal', true)
+    this._element.scrollTop = 0
 
-    if (this._dialog.classList.contains(CLASS_NAME_SCROLLABLE) && modalBody) {
+    if (modalBody) {
       modalBody.scrollTop = 0
-    } else {
-      this._element.scrollTop = 0
     }
 
     if (transition) {