blob: 1860404e43936e999a17ecc019a7cf9cf50527a2 (
plain)
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
|
'use strict';
var keys = require('object-keys');
var hasSymbols = typeof Symbol === 'function' && typeof Symbol('foo') === 'symbol';
var toStr = Object.prototype.toString;
var concat = Array.prototype.concat;
var defineDataProperty = require('define-data-property');
var isFunction = function (fn) {
return typeof fn === 'function' && toStr.call(fn) === '[object Function]';
};
var supportsDescriptors = require('has-property-descriptors')();
var defineProperty = function (object, name, value, predicate) {
if (name in object) {
if (predicate === true) {
if (object[name] === value) {
return;
}
} else if (!isFunction(predicate) || !predicate()) {
return;
}
}
if (supportsDescriptors) {
defineDataProperty(object, name, value, true);
} else {
defineDataProperty(object, name, value);
}
};
var defineProperties = function (object, map) {
var predicates = arguments.length > 2 ? arguments[2] : {};
var props = keys(map);
if (hasSymbols) {
props = concat.call(props, Object.getOwnPropertySymbols(map));
}
for (var i = 0; i < props.length; i += 1) {
defineProperty(object, props[i], map[props[i]], predicates[props[i]]);
}
};
defineProperties.supportsDescriptors = !!supportsDescriptors;
module.exports = defineProperties;
|
