Initial commit as of 2018-10-16

assets/js/core/polyfill.js

@@ -0,0 +1,63 @@
+let elem = document.createElement('div');
+elem.classList.toggle('test-class', false);
+if (elem.classList.contains('test-class')) {
+  let _toggle = DOMTokenList.prototype.toggle;
+  DOMTokenList.prototype.toggle = function(token, force) {
+    if (arguments.length > 1 && !this.contains(token) === !force) {
+      return force;
+    } else {
+      return _toggle.call(this, token);
+    }
+  };
+}
+
+if (!String.prototype.startsWith) {
+  String.prototype.startsWith = function(searchString, position){
+    position = position || 0;
+    return this.substr(position, searchString.length) === searchString;
+  };
+}
+
+if (!String.prototype.endsWith) {
+  String.prototype.endsWith = function(searchString, position) {
+    var subjectString = this.toString();
+    if (typeof position !== 'number' || !isFinite(position) || Math.floor(position) !== position || position > subjectString.length) {
+      position = subjectString.length;
+    }
+    position -= searchString.length;
+    var lastIndex = subjectString.indexOf(searchString, position);
+    return lastIndex !== -1 && lastIndex === position;
+  };
+}
+
+if (!Array.prototype.find) {
+  Object.defineProperty(Array.prototype, "find", {
+    value: function(predicate) {
+      if (this === null) {
+        throw new TypeError('Array.prototype.find called on null or undefined');
+      }
+      if (typeof predicate !== 'function') {
+        throw new TypeError('predicate must be a function');
+      }
+      var list = Object(this);
+      var length = list.length >>> 0;
+      var thisArg = arguments[1];
+      var value;
+
+      for (var i = 0; i < length; i++) {
+        value = list[i];
+        if (predicate.call(thisArg, value, i, list)) {
+          return value;
+        }
+      }
+      return undefined;
+    }
+  });
+}
+
+document.addEventListener("DOMContentLoaded", function() {
+  // Disable resizing in Firefox
+  document.execCommand("enableObjectResizing", false, false);
+  // Disable automatic linkifying in IE11
+  document.execCommand("autoUrlDetect", false, false);
+});