file_script_module.html

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<html>

<body>

  <script>

// Helper methods.

function ok(a, msg) {

  parent.postMessage({ check: !!a, msg }, "*")

function is(a, b, msg) {

  ok(a === b, msg);

function finish() {

  parent.postMessage({ done: true }, "*");

  </script>

  <script id="a" nomodule>42</script>

  <script id="b">42</script>

  <script>

// Let's test the behavior of nomodule attribute and noModule getter/setter.

var a = document.getElementById("a");

is(a.noModule, true, "HTMLScriptElement with nomodule attribute has noModule set to true");

a.removeAttribute("nomodule");

is(a.noModule, false, "HTMLScriptElement without nomodule attribute has noModule set to false");

a.noModule = true;

ok(a.hasAttribute('nomodule'), "HTMLScriptElement.noModule = true add the nomodule attribute");

var b = document.getElementById("b");

is(b.noModule, false, "HTMLScriptElement without nomodule attribute has noModule set to false");

b.noModule = true;

ok(b.hasAttribute('nomodule'), "HTMLScriptElement.noModule = true add the nomodule attribute");

  </script>

  <script>var foo = 42;</script>

  <script nomodule>foo = 43;</script>

  <script>

is(foo, 42, "nomodule HTMLScriptElements should not be executed in modern browsers");

finish();

  </script>

</body>

</html>