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How To...

Run Intern in my own test page in a browser

Load the browser/intern.js bundle in a page using a script tag. This will create an intern global that can be used to configure Intern and start tests.

<!DOCTYPE html>
	<head>
		<script src="node_modules/intern/browser/intern.js"></script>
        <script>
            intern.config({ suites: [
                'tests/unit/a.js',
                'tests/unit/b.js'
            ]});
            intern.run();
        </script>
	</head>
	<body>
	</body>
</html>

Test ES modules

To work with ES modules in Node, install babel-register and load it as a plugin:

// intern.json
{
  "plugins": "node_modules/babel-register/lib/node.js"
}

To work with ES modules in the browser, you’ll need to setup a loader. One option is to use SystemJS configured with babel support:

// intern.json
{
  "browser": {
    "loader": {
      "script": "systemjs",
      "options": {
        "map": {
          "plugin-babel": "node_modules/systemjs-plugin-babel/plugin-babel.js",
          "systemjs-babel-build": "node_modules/systemjs-plugin-babel/systemjs-babel-browser.js"
        },
        "transpiler": "plugin-babel"
      }
    }
  }
}

To get code covereage in the browser when using Intern in WebDriver mode, enable ESM support in the instrumenter with:

// intern.json
{
  "instrumenterOptions": {
    "esModules": true
  }
}