trusted-types/trusted-types-tojson.html

<!DOCTYPE html>
<head>
  <script src="/resources/testharness.js"></script>
  <script src="/resources/testharnessreport.js"></script>
  <meta http-equiv="Content-Security-Policy" content="trusted-types foo">
</head>
<body>
<script>
test(t => {
  let policy = trustedTypes.createPolicy("foo", {
    createHTML: h => h,
    createScript: s => s,
    createScriptURL: u => u,
   });

  assert_equals(JSON.stringify({"x": policy.createHTML("<p>foo</p>")}),
                "{\"x\":\"<p>foo</p>\"}");
  assert_equals(JSON.stringify({"x": policy.createScript("foo(bar)")}),
                "{\"x\":\"foo(bar)\"}");
  assert_equals(JSON.stringify({"x": policy.createScriptURL("https://foo.example.com/bar")}),
                "{\"x\":\"https://foo.example.com/bar\"}");
}, "toJSON");
</script>
</body>