| // Copyright (C) 2019 ta7sudan. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| esid: sec-proxy-object-internal-methods-and-internal-slots-getprototypeof |
| description: > |
| instanceof operator will return true if trap result is the prototype of the function. |
| info: | |
| Runtime Semantics: InstanceofOperator ( V, target ) |
| |
| 5. Return ? OrdinaryHasInstance(target, V). |
| |
| OrdinaryHasInstance ( C, O ) |
| |
| 4. Let P be ? Get(C, "prototype"). |
| ... |
| 6. Repeat, |
| a. Set O to ? O.[[GetPrototypeOf]](). |
| b. If O is null, return false. |
| c. If SameValue(P, O) is true, return true. |
| |
| [[GetPrototypeOf]] ( ) |
| |
| 7. Let handlerProto be ? Call(trap, handler, « target »). |
| 8. If Type(handlerProto) is neither Object nor Null, throw a TypeError exception. |
| 9. Let extensibleTarget be ? IsExtensible(target). |
| 10. If extensibleTarget is true, return handlerProto. |
| features: [Proxy] |
| ---*/ |
| |
| function Custom() {} |
| |
| var p = new Proxy({}, { |
| getPrototypeOf() { |
| return Custom.prototype; |
| } |
| }); |
| |
| assert(p instanceof Custom); |
