Getting Error: Object doesn't support property or method 'assign'

Question

I am using this jquery popup plugin from this link on my WordPress site. It's working fine on all browsers but giving the following error on IE11.

Answer 1

As others have mentioned, the Object.assign() method is not supported in IE, but there is a polyfill available, just include it "before" your plugin declaration:

if (typeof Object.assign != 'function') {   Object.assign = function(target) {     'use strict';     if (target == null) {       throw new TypeError('Cannot convert undefined or null to object');     }      target = Object(target);     for (var index = 1; index < arguments.length; index++) {       var source = arguments[index];       if (source != null) {         for (var key in source) {           if (Object.prototype.hasOwnProperty.call(source, key)) {             target[key] = source[key];           }         }       }     }     return target;   }; } 

From https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign

Test page: http://jsbin.com/pimixel/edit?html,js,output (just remove the polyfill to get the same error you're getting on your page).

Answer 2

@John Doe

I figured out from your comment that you want to implement this in node/react stack. This is very different from original question and you should have asked your own ;)
Anyways, Heres what you need to do...

You can use [es6-object-assign][1]. It is an ES6 Object.assign() "polyfill".

First, in package.json in your root folder, add es6-object-assign as a dependency:

"dependencies": {     "es6-object-assign": "^1.0.2",     "react": "^0.12.0",     ...   }, 

Then if you want to use it in node environment use:

require('es6-object-assign').polyfill(); 

If you are having the issue on front (browser) end...
Add it in your index.html file...

<script src="location_of_node_modules/es6-object-assign/dist/object-assign.min.js"></script> <script>   window.ObjectAssign.polyfill(); </script> 

location_of_node_modules depends on boilerplate you use, mostly just node_modules, but sometimes when index.html is in a subdirectory you need to use, ../node_modules