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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /mimesniff/sniffing/html-comment.tentative.window.html - WPT Dashboard Interop Dashboard
promise_test(async t => {
const response = await fetch("support/html-comment?pipe=header(Content-Type,DELETE)");
const text = await response.text();
assert_true(text.startsWith("<!--"));
const popup = window.open("support/html-comment?pipe=header(Content-Type,DELETE)");
t.add_cleanup(() => popup.close());
await new Promise(resolve => {
popup.onload = resolve;
});
assert_equals(popup.document.contentType, "text/html");
assert_equals(popup.document.documentElement.localName, "html");
}, "Content starting with <!-- without space or > is sniffed as HTML");