Permalink
January 18, 2023 20:26
Newer
100644
52 lines (44 sloc)
1.42 KB
Ignoring revisions in .git-blame-ignore-revs.
1
'use strict';
2
3
var has = require('has');
4
5
var GetIntrinsic = require('get-intrinsic');
6
7
var $TypeError = GetIntrinsic('%TypeError%');
8
9
var Type = require('./Type');
10
var ToBoolean = require('./ToBoolean');
11
var IsCallable = require('./IsCallable');
12
13
// https://262.ecma-international.org/5.1/#sec-8.10.5
14
15
module.exports = function ToPropertyDescriptor(Obj) {
16
if (Type(Obj) !== 'Object') {
17
throw new $TypeError('ToPropertyDescriptor requires an object');
18
}
19
20
var desc = {};
21
if (has(Obj, 'enumerable')) {
22
desc['[[Enumerable]]'] = ToBoolean(Obj.enumerable);
23
}
24
if (has(Obj, 'configurable')) {
25
desc['[[Configurable]]'] = ToBoolean(Obj.configurable);
26
}
27
if (has(Obj, 'value')) {
28
desc['[[Value]]'] = Obj.value;
29
}
30
if (has(Obj, 'writable')) {
31
desc['[[Writable]]'] = ToBoolean(Obj.writable);
32
}
33
if (has(Obj, 'get')) {
34
var getter = Obj.get;
35
if (typeof getter !== 'undefined' && !IsCallable(getter)) {
36
throw new $TypeError('getter must be a function');
37
}
38
desc['[[Get]]'] = getter;
39
}
40
if (has(Obj, 'set')) {
41
var setter = Obj.set;
42
if (typeof setter !== 'undefined' && !IsCallable(setter)) {
43
throw new $TypeError('setter must be a function');
44
}
45
desc['[[Set]]'] = setter;
46
}
47
48
if ((has(desc, '[[Get]]') || has(desc, '[[Set]]')) && (has(desc, '[[Value]]') || has(desc, '[[Writable]]'))) {
49
throw new $TypeError('Invalid property descriptor. Cannot both specify accessors and a value or writable attribute');
50
}
51
return desc;
52
};