1 files changed, 20 insertions, 0 deletions
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;
+  };