Organize our polyfills and standardize on core-js

5 files changed, 47 insertions, 1 deletions

diff --git a/app/assets/javascripts/commons/bootstrap.js b/app/assets/javascripts/commons/bootstrap.js
index db0cbfd87c3..36bfe457be9 100644
--- a/app/assets/javascripts/commons/bootstrap.js
+++ b/app/assets/javascripts/commons/bootstrap.js
@@ -1,4 +1,4 @@
-import 'jquery';
+import $ from 'jquery';
 
 // bootstrap jQuery plugins
 import 'bootstrap-sass/assets/javascripts/bootstrap/affix';
@@ -8,3 +8,9 @@ import 'bootstrap-sass/assets/javascripts/bootstrap/modal';
 import 'bootstrap-sass/assets/javascripts/bootstrap/tab';
 import 'bootstrap-sass/assets/javascripts/bootstrap/transition';
 import 'bootstrap-sass/assets/javascripts/bootstrap/tooltip';
+
+// custom jQuery functions
+$.fn.extend({
+  disable() { return $(this).attr('disabled', 'disabled').addClass('disabled'); },
+  enable() { return $(this).removeAttr('disabled').removeClass('disabled'); },
+});
diff --git a/app/assets/javascripts/commons/index.js b/app/assets/javascripts/commons/index.js
index 72ede1d621a..7063f59d446 100644
--- a/app/assets/javascripts/commons/index.js
+++ b/app/assets/javascripts/commons/index.js
@@ -1,2 +1,3 @@
+import './polyfills';
 import './jquery';
 import './bootstrap';
diff --git a/app/assets/javascripts/commons/polyfills.js b/app/assets/javascripts/commons/polyfills.js
new file mode 100644
index 00000000000..fbd0db64ca7
--- /dev/null
+++ b/app/assets/javascripts/commons/polyfills.js
@@ -0,0 +1,10 @@
+// ECMAScript polyfills
+import 'core-js/fn/array/find';
+import 'core-js/fn/object/assign';
+import 'core-js/fn/promise';
+import 'core-js/fn/string/code-point-at';
+import 'core-js/fn/string/from-code-point';
+
+// Browser polyfills
+import './polyfills/custom_event';
+import './polyfills/element';
diff --git a/app/assets/javascripts/commons/polyfills/custom_event.js b/app/assets/javascripts/commons/polyfills/custom_event.js
new file mode 100644
index 00000000000..aea61b82d03
--- /dev/null
+++ b/app/assets/javascripts/commons/polyfills/custom_event.js
@@ -0,0 +1,9 @@
+if (typeof window.CustomEvent !== 'function') {
+  window.CustomEvent = function CustomEvent(event, params) {
+    const evt = document.createEvent('CustomEvent');
+    const evtParams = params || { bubbles: false, cancelable: false, detail: undefined };
+    evt.initCustomEvent(event, evtParams.bubbles, evtParams.cancelable, evtParams.detail);
+    return evt;
+  };
+  window.CustomEvent.prototype = Event;
+}
diff --git a/app/assets/javascripts/commons/polyfills/element.js b/app/assets/javascripts/commons/polyfills/element.js
new file mode 100644
index 00000000000..9a1f73bf2ac
--- /dev/null
+++ b/app/assets/javascripts/commons/polyfills/element.js
@@ -0,0 +1,20 @@
+Element.prototype.closest = Element.prototype.closest ||
+  function closest(selector, selectedElement = this) {
+    if (!selectedElement) return null;
+    return selectedElement.matches(selector) ?
+      selectedElement :
+      Element.prototype.closest(selector, selectedElement.parentElement);
+  };
+
+Element.prototype.matches = Element.prototype.matches ||
+  Element.prototype.matchesSelector ||
+  Element.prototype.mozMatchesSelector ||
+  Element.prototype.msMatchesSelector ||
+  Element.prototype.oMatchesSelector ||
+  Element.prototype.webkitMatchesSelector ||
+  function matches(selector) {
+    const elms = (this.document || this.ownerDocument).querySelectorAll(selector);
+    let i = elms.length - 1;
+    while (i >= 0 && elms.item(i) !== this) { i -= 1; }
+    return i > -1;
+  };