avoid drag img

js/src/carousel.js

@@ -64,6 +64,7 @@ const Event = {
   POINTERUP      : `pointerup${EVENT_KEY}`,
   POINTERLEAVE   : `pointerleave${EVENT_KEY}`,
   POINTERCANCEL  : `pointercancel${EVENT_KEY}`,
+  DRAG_START     : `dragstart${EVENT_KEY}`,
   LOAD_DATA_API  : `load${EVENT_KEY}${DATA_API_KEY}`,
   CLICK_DATA_API : `click${EVENT_KEY}${DATA_API_KEY}`
 }
@@ -84,6 +85,7 @@ const Selector = {
   ACTIVE      : '.active',
   ACTIVE_ITEM : '.active.carousel-item',
   ITEM        : '.carousel-item',
+  ITEM_IMG    : '.carousel-item img',
   NEXT_PREV   : '.carousel-item-next, .carousel-item-prev',
   INDICATORS  : '.carousel-indicators',
   DATA_SLIDE  : '[data-slide], [data-slide-to]',
@@ -323,6 +325,7 @@ class Carousel {
       }
     }
 
+    $(this._element.querySelectorAll(Selector.ITEM_IMG)).on(Event.DRAG_START, (e) => e.preventDefault())
     if (this._pointerEvent) {
       $(this._element).on(Event.POINTERDOWN, (event) => start(event))
       $(this._element).on(Event.POINTERUP, (event) => end(event))

js/tests/unit/carousel.js

@@ -4,17 +4,15 @@ $(function () {
   window.Carousel = typeof bootstrap !== 'undefined' ? bootstrap.Carousel : Carousel
 
   var originWinPointerEvent = window.PointerEvent
-  var originMsPointerEvent = window.MSPointerEvent
+  window.MSPointerEvent = null
   var supportPointerEvent = Boolean(window.PointerEvent || window.MSPointerEvent)
 
   function clearPointerEvents() {
     window.PointerEvent = null
-    window.MSPointerEvent = null
   }
 
   function restorePointerEvents() {
     window.PointerEvent = originWinPointerEvent
-    window.MSPointerEvent = originMsPointerEvent
   }
 
   var stylesCarousel = [
@@ -1032,11 +1030,11 @@ $(function () {
       return
     }
 
+    document.documentElement.ontouchstart = $.noop
     Simulator.setType('pointer')
     assert.expect(3)
     var $styles = $(stylesCarousel).appendTo('head')
     var done = assert.async()
-    document.documentElement.ontouchstart = $.noop
 
     var carouselHTML =
         '<div class="carousel" data-interval="false">' +
@@ -1050,8 +1048,7 @@ $(function () {
         '  </div>' +
         '</div>'
 
-    var $carousel = $(carouselHTML)
+    var $carousel = $(carouselHTML).appendTo('#qunit-fixture')
-    $carousel.appendTo('#qunit-fixture')
     var $item = $('#item')
     $carousel.bootstrapCarousel()
     var carousel = $carousel.data('bs.carousel')
@@ -1061,8 +1058,8 @@ $(function () {
       assert.ok(true, 'slid event fired')
       assert.ok($item.hasClass('active'))
       assert.ok(spy.called)
-      delete document.documentElement.ontouchstart
       $styles.remove()
+      delete document.documentElement.ontouchstart
       done()
     })
 
@@ -1075,6 +1072,7 @@ $(function () {
   QUnit.test('should allow swiperight and call prev with touch events', function (assert) {
     Simulator.setType('touch')
     clearPointerEvents()
+
     assert.expect(3)
     var done = assert.async()
     document.documentElement.ontouchstart = $.noop
@@ -1119,12 +1117,12 @@ $(function () {
       return
     }
 
+    document.documentElement.ontouchstart = $.noop
     assert.expect(3)
     Simulator.setType('pointer')
 
     var $styles = $(stylesCarousel).appendTo('head')
     var done = assert.async()
-    document.documentElement.ontouchstart = $.noop
 
     var carouselHTML =
         '<div class="carousel" data-interval="false">' +
@@ -1150,6 +1148,7 @@ $(function () {
       assert.ok(!$item.hasClass('active'))
       assert.ok(spy.called)
       $styles.remove()
+      delete document.documentElement.ontouchstart
       done()
     })
 
@@ -1164,9 +1163,9 @@ $(function () {
     assert.expect(3)
     clearPointerEvents()
     Simulator.setType('touch')
+    document.documentElement.ontouchstart = $.noop
 
     var done = assert.async()
-    document.documentElement.ontouchstart = $.noop
 
     var carouselHTML =
         '<div class="carousel" data-interval="false">' +
@@ -1192,6 +1191,7 @@ $(function () {
       assert.ok(!$item.hasClass('active'))
       assert.ok(spy.called)
       restorePointerEvents()
+      delete document.documentElement.ontouchstart
       done()
     })
 
@@ -1205,6 +1205,7 @@ $(function () {
   QUnit.test('should not allow pinch with touch events', function (assert) {
     assert.expect(0)
     clearPointerEvents()
+
     Simulator.setType('touch')
     var done = assert.async()
     document.documentElement.ontouchstart = $.noop
@@ -1221,6 +1222,7 @@ $(function () {
       touches: 2
     }, function () {
       restorePointerEvents()
+      delete document.documentElement.ontouchstart
       done()
     })
   })