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I'm trying to use React with Internet Explorer 9 but getting the following errors even trying to run something very barebones:

SCRIPT438: Object doesn't support property or method 'isArray' react-with-addons.js, line 4 character 317

SCRIPT438: Object doesn't support property or method 'create' JSXTransformer.js, line 4 character 326

I've read, which says IE8 might have these issues, but no mention about IE9. Googling didn't really bring up any solutions either.

Still, I tried adding es5-shim/sham as suggested on that page. That results in a different error:

SCRIPT438: Object doesn't support property or method 'hasAttribute' es5-shim.min.js, line 6 character 4143

Has anyone encountered these errors before in IE9 or otherwise?

Thanks for the help!

The full code I'm trying to run is:


  <script src="js/es5-shim.min.js"></script>
  <script src="js/es5-sham.min.js"></script>
  <script src=""></script>
  <script src="js/react-with-addons.js"></script>
  <script src="js/JSXTransformer.js"></script>


  <div id="container"></div>
  <script type="text/jsx">
    <h1>HELLO WORLD!</h1>


Generally, you need to include the specified polyfills for ES5 features (as you've noticed):

You may also need HTML5 Shiv in addition to the the polyfills you've provided.

More specifically, though, the problem is probably not with polyfills but with the document mode IE9 is running in. You want to make sure that you are setting the correct document mode in your HTML file so IE knows which version to target. Otherwise, even though you are using IE9 it may be targeting IE7 which is no good.

<meta http-equiv="X-UA-Compatible" content="IE=edge">
42 users liked answer #0dislike answer #042
monastic-panic profile pic

In index.js file you have to add polyfill. These imports should be in the first of your import.

import 'react-app-polyfill/ie9';
import 'react-app-polyfill/ie11';   
//other imports

Now open in ur ie it works.

Before import you have to install react-app-polyfill.

 //To install use below command:

 npm install react-app-polyfill

link reference:

6 users liked answer #1dislike answer #16
Manjula Devi profile pic
Manjula Devi

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