forked from azer/require-sdk
-
Notifications
You must be signed in to change notification settings - Fork 0
/
index.js
58 lines (39 loc) · 1009 Bytes
/
index.js
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
55
56
57
58
var pubsub = require("pubsub");
var loadScript = require("load-script");
module.exports = requireSDK;
function requireSDK (url, global) {
var onReady = pubsub();
var hasManualTrigger;
var isLoading;
var isLoaded;
load.trigger = setManualTrigger;
return load;
function isAlreadyLoaded () {
return window[global];
}
function load (callback) {
if (isAlreadyLoaded() || isLoaded) {
return callback && callback(undefined, window[global]);
}
callback && onReady.subscribe(callback);
if (isLoading) return;
isLoading = true;
if (!url) return;
loadScript(url, function (error) {
if (hasManualTrigger) return;
if (error) {
isLoaded = true;
return onReady.publish(error);
}
trigger();
});
};
function trigger () {
isLoaded = true;
onReady.publish(undefined, global ? window[global] : undefined);
}
function setManualTrigger () {
hasManualTrigger = true;
return trigger;
}
}