Getting Error: Object doesn't support property

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.

Any help is much appreciated.

Answer 1

@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

Answer 2

Since you tagged the question with jQuery you can use the jQuery extend function. No need for a polyfill and it does deep merge as well.

For Example:

var object1 = {
  apple: 0,
  banana: { weight: 52, price: 100 },
  cherry: 97
};
var object2 = {
  banana: { price: 200 },
  durian: 100
};

// Merge object2 into object1
$.extend( object1, object2 );

Result:

{"apple":0,"banana":{"price":200},"cherry":97,"durian":100}

Answer 3

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 4

As per the documentation, Object.assign() is a new technology, part of the ECMAScript 2015 (ES6) standard:

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

And it is not supported by IE.

Answer 5

@Andres-Ilich has the right answer to your question but you're asking the wrong question:

Why not just use a jQuery plugin that supports IE like Zurb's excellent Reveal: https://github.com/zurb/reveal

It will do everything you want and not throw this error.

Answer 6

Currently working on a jQuery popup myself: https://github.com/seahorsepip/jPopup

Has everything you'd expect of a popup and more :D

Anyway back on topic, I'm currently writing version 2 which is a big rewrite and adds support for IE6 (version 1 was IE7+) and ran into a similiar error...

Original code that gave the error in IE6:

//Insane code for an insane browser
this._vars.fakeScrollbar = $("<div style=\"position:absolute;top:expression(document.documentElement.scrollTop);right:0;bottom:0;margin-left:-200px;width:0;overflow-y:scroll;height:expression(document.documentElement.clientHeight);z-index:9999999;\"></div>");

The hack I had to come up with:

//Insane code for an insane browser
this._vars.fakeScrollbar = $("<div>");
this._vars.fakeScrollbar.html("<div style=\"position:absolute;top:expression(document.documentElement.scrollTop);right:0;bottom:0;margin-left:-200px;width:0;overflow-y:scroll;height:expression(document.documentElement.clientHeight);z-index:9999999;\"></div>");
this._vars.fakeScrollbar = this._vars.fakeScrollbar.children();