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Launcher for Internet Explorer.


The easiest way is to keep karma-ie-launcher as a devDependency, by running

npm install karma-ie-launcher --save-dev


// karma.conf.js 
module.exports = function(config) {
    browsers: ['IE']

You can pass list of browsers as a CLI argument too:

karma start --browsers IE

You can run IE in emulation mode by setting the 'x-ua-compatible' option:

customLaunchers: {
  IE9: {
    base: 'IE',
    'x-ua-compatible': 'IE=EmulateIE9'
  IE8: {
    base: 'IE',
    'x-ua-compatible': 'IE=EmulateIE8'

See Specifying legacy document modes on MSDN.

Running IE in "No add-ons mode"

Please note that since v0.2.0 default behaviour of launching Internet Explorer has changed. Now it runs using system-wide configuration (uses same settings as if you would run it manually) but prior to v0.2.0 it was spawned with -extoff flag set explicitly, so all extensions were disabled.

If you expect the same behaviour as it was before v0.2.0, Karma configuration should be slightly changed:

  • create new customLauncher configuration (IE_no_addons is used in an example below) with custom flags (in our case it is -extoff only)
  • browser IE in browsers field should be replaced with your new custom launcher name
  browsers: ['IE_no_addons'],
  customLaunchers: {
    IE_no_addons: {
      base:  'IE',
      flags: ['-extoff']

See IE Command-Line Options on MSDN.

For more information on Karma see the homepage.