IE8 does not support indexOf method of Array,

[shelbeniskb]

I meet the code in webpack

if(installedModules[request].parents.indexOf(moduleId) < 0)

but the IE8 seems not support indexOf, how can I make a workaround?

[noomorph]

@shelbeniskb, well, maybe you could include a polyfill beforehand into your source HTML file...

<!--[if lte IE 8]>
<script type="text/javascript" src="ie8-polyfill.js"></script>
<![endif]-->

And then in your entry file write something like that:

require('file?name=[name].[ext]!polyfills/ie8-polyfill');

Webpack will put it into your output folder, and IE8 will load the polyfill...

[shelbeniskb]

@noomorph Thanks, it can solve the problem, but not very well.
there is also another similar solution:

entry: {
    main: [
      'es5-shim',
      './src/js/main.js'
    ]
  }

[noomorph]

@shelbeniskb , ohhh, I thought webpack's bootstrap section in entry file is incomptabile with IE8... Your suggested option is a bit safer and cleaner.