Build: Add lib/array-polyfills.js

lib/array-polyfills.js

@@ -0,0 +1,48 @@
+// TODO: Add polyfill for Array.from
+
+if (!Array.prototype.includes) {
+  Array.prototype.includes = function(searchElement, fromIndex) {
+    'use strict';
+    if (!this) {
+      throw new TypeError('Array.prototype.includes called on null or undefined');
+    }
+
+    return this.indexOf(searchElement, fromIndex) !== -1;
+  }
+}
+
+if (!Array.prototype.every) {
+  Array.prototype.every = function(func) {
+    'use strict';
+    let result = true;
+
+    this.forEach((item, index) => {
+      if (!result) {
+        return;
+      } else if (!func(item, index, this)) {
+        result = false;
+      }
+    });
+
+    return result;
+  }
+}
+
+if (!Array.prototype.some) {
+  Array.prototype.some = function(func) {
+    'use strict';
+    let result = false;
+
+    this.forEach((item, index) => {
+      if (result) {
+        return;
+      } else if (func(item, index, this)) {
+        result = true;
+      }
+    });
+
+    return result;
+  }
+}
+
+export default Array;