blob: 30db73c9d01365ca226cd1e288e9382584fdc787 (
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
|
/*global self*/
import Promise from './promise';
export default function polyfill() {
let local;
if (typeof global !== 'undefined') {
local = global;
} else if (typeof self !== 'undefined') {
local = self;
} else {
try {
local = Function('return this')();
} catch (e) {
throw new Error('polyfill failed because global object is unavailable in this environment');
}
}
let P = local.Promise;
if (P) {
var promiseToString = null;
try {
promiseToString = Object.prototype.toString.call(P.resolve());
} catch(e) {
// silently ignored
}
if (promiseToString === '[object Promise]' && !P.cast){
return;
}
}
local.Promise = Promise;
}
|
