1 files changed, 40 insertions, 0 deletions
diff --git a/actionview/app/assets/javascripts/rails-ujs/utils/event.coffee b/actionview/app/assets/javascripts/rails-ujs/utils/event.coffee
new file mode 100644
index 0000000000..8d3ff007ea
--- /dev/null
+++ b/actionview/app/assets/javascripts/rails-ujs/utils/event.coffee
@@ -0,0 +1,40 @@
+#= require ./dom
+
+{ matches } = Rails
+
+# Polyfill for CustomEvent in IE9+
+# https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent/CustomEvent#Polyfill
+CustomEvent = window.CustomEvent
+
+if typeof CustomEvent isnt 'function'
+  CustomEvent = (event, params) ->
+    evt = document.createEvent('CustomEvent')
+    evt.initCustomEvent(event, params.bubbles, params.cancelable, params.detail)
+    evt
+  CustomEvent.prototype = window.Event.prototype
+
+# Triggers a custom event on an element and returns false if the event result is false
+fire = Rails.fire = (obj, name, data) ->
+  event = new CustomEvent(
+    name,
+    bubbles: true,
+    cancelable: true,
+    detail: data,
+  )
+  obj.dispatchEvent(event)
+  !event.defaultPrevented
+
+# Helper function, needed to provide consistent behavior in IE
+Rails.stopEverything = (e) ->
+  fire(e.target, 'ujs:everythingStopped')
+  e.preventDefault()
+  e.stopPropagation()
+  e.stopImmediatePropagation()
+
+Rails.delegate = (element, selector, eventType, handler) ->
+  element.addEventListener eventType, (e) ->
+    target = e.target
+    target = target.parentNode until not (target instanceof Element) or matches(target, selector)
+    if target instanceof Element and handler.call(target, e) == false
+      e.preventDefault()
+      e.stopPropagation()