Source code
Revision control
Copy as Markdown
Other Tools
// Copyright (C) 2019 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-object.seal
description: >
Object.seal throws if SetIntegrityLevel(O, sealed) returns false.
info: |
Object.seal ( O )
...
2. Let status be ? SetIntegrityLevel(O, sealed).
3. If status is false, throw a TypeError exception.
SetIntegrityLevel ( O, level )
...
3. Let status be ? O.[[PreventExtensions]]().
4. If status is false, return false.
---*/
const p = new Proxy({}, {
preventExtensions() {
return false;
},
});
assert.throws(TypeError, () => {
Object.seal(p);
});
reportCompare(0, 0);