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asyncwait

v1.0.2

Published

Wait for many asynchronous tasks to finish.

Downloads

13

Readme

Async Wait

This is small JavaScript utility that waits for many async operations to finish. This is very similar to something like async.map or Promise.all, but with a much looser API.

Install

Download the latest version from our release page and use via a script tag. The variable asyncWait will be attached to window.

<script type="text/javascript" src="asyncwait.js"></script>

If using Browserify or Node.js, you can install via NPM and use via require("asyncwait").

$ npm install asyncwait

Usage

Call asyncWait() with an onEmpty callback. This function will be called when the wait queue is completely drained. This will return a wait function which can be wrapped around any async callback.

var wait = asyncWait(function() {
    console.log("done");
});

setTimeout(wait(function() {
    console.log("my timeout");
}), 100);

It also plays really nice with ES6 Promises:

var wait = asyncWait(function() {
    console.log("done");
});

// called outside so it is registered immediately
var done = wait();

myAsyncTask().then(function() {
    console.log("success");
    done();
}, done);