1 files changed, 30 insertions, 0 deletions
diff --git a/src/types/ArrayPolyfill.js b/src/types/ArrayPolyfill.js
new file mode 100644
index 0000000..cf95d54
--- /dev/null
+++ b/src/types/ArrayPolyfill.js
@@ -0,0 +1,30 @@
+/* eslint no-new-func: "off" */
+export const subClassArray = (function () {
+  try {
+    // try es6 subclassing
+    return Function('name', 'baseClass', '_constructor', [
+      'baseClass = baseClass || Array',
+      'return {',
+      '[name]: class extends baseClass {',
+      'constructor (...args) {',
+      'super(...args)',
+      '_constructor && _constructor.apply(this, args)',
+      '}',
+      '}',
+      '}[name]'
+    ].join('\n'))
+  } catch (e) {
+    // Use es5 approach
+    return (name, baseClass = Array, _constructor) => {
+      const Arr = function () {
+        baseClass.apply(this, arguments)
+        _constructor && _constructor.apply(this, arguments)
+      }
+
+      Arr.prototype = Object.create(baseClass.prototype)
+      Arr.prototype.constructor = Arr
+
+      return Arr
+    }
+  }
+})()