1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
// Copyright (C) 2020 Alexey Shvayka. 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-delete-p
description: >
If "deleteProperty" trap is null or undefined, [[Delete]] call is
properly forwarded to [[ProxyTarget]] (which is also a Proxy object).
info: |
[[Delete]] ( P )
[...]
5. Let target be O.[[ProxyTarget]].
6. Let trap be ? GetMethod(handler, "deleteProperty").
7. If trap is undefined, then
a. Return ? target.[[Delete]](P).
features: [Proxy, Reflect]
---*/
var array = [1];
var arrayTarget = new Proxy(array, {});
var arrayProxy = new Proxy(arrayTarget, {
deleteProperty: undefined,
});
assert(delete arrayProxy[0]);
assert(!array.hasOwnProperty("0"));
assert(!Reflect.deleteProperty(arrayProxy, "length"));
assert.sameValue(array.length, 1);
var trapCalls = 0;
var target = new Proxy({}, {
deleteProperty: function(_target, key) {
trapCalls++;
return key === "foo";
},
});
var proxy = new Proxy(target, {
deleteProperty: undefined,
});
assert(delete proxy.foo);
assert.sameValue(trapCalls, 1);
assert.throws(TypeError, function() {
"use strict";
delete proxy.bar;
});
assert.sameValue(trapCalls, 2);
reportCompare(0, 0);
|
