<!DOCTYPE html> <meta charset="utf-8"> <title>Cross-realm getter / setter / operation doesn't use lexical global object to throw an error for incompatible |this| value</title> <link rel="help" href="https://webidl.spec.whatwg.org/#dfn-attribute-getter"> <link rel="help" href="https://webidl.spec.whatwg.org/#dfn-attribute-setter"> <link rel="help" href="https://webidl.spec.whatwg.org/#dfn-create-operation-function"> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <script src="support/create-realm.js"></script> <body> <script> promise_test(async t => { const other = await createRealm(t); const notElement = Object.create(other.HTMLElement.prototype); assert_throws_js(other.TypeError, () => { Object.create(other.document).head; }); assert_throws_js(other.TypeError, () => { Object.getOwnPropertyDescriptor(other.HTMLElement.prototype, "title").get.call(notElement); }); assert_throws_js(other.TypeError, () => { Reflect.get(other.document.createElement("div"), "hidden", notElement); }); assert_throws_js(other.TypeError, () => { new Proxy(other.text, {}).nodeType; }); }, "Cross-realm getter throws when called on incompatible object"); promise_test(async t => { const other = await createRealm(t); const notElement = Object.create(other.HTMLElement.prototype); const notText = Object.create(other.Text.prototype); assert_throws_js(other.TypeError, () => { Object.create(other.element).innerHTML = ""; }); assert_throws_js(other.TypeError, () => { Object.getOwnPropertyDescriptor(other.HTMLElement.prototype, "onclick").set.call(notElement, null); }); assert_throws_js(other.TypeError, () => { Reflect.set(new other.Text("foo"), "data", "foo", notText); }); assert_throws_js(other.TypeError, () => { new Proxy(other.document, {}).title = ""; }); }, "Cross-realm setter throws when called on incompatible object"); promise_test(async t => { const other = await createRealm(t); const notDocument = Object.create(other.HTMLDocument.prototype); const notText = Object.create(other.Text.prototype); assert_throws_js(other.TypeError, () => { Object.create(other.element).click(); }); assert_throws_js(other.TypeError, () => { other.document.querySelector.call(notDocument, "*"); }); assert_throws_js(other.TypeError, () => { Reflect.apply(other.text.remove, notText, []); }); assert_throws_js(other.TypeError, () => { new Proxy(other.document.createElement("a"), {}).addEventListener("foo", () => {}); }); }, "Cross-realm operation throws when called on incompatible object"); </script>