async
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    3.2.1 • Public • Published

    Async Logo

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    Async is a utility module which provides straight-forward, powerful functions for working with asynchronous JavaScript. Although originally designed for use with Node.js and installable via npm i async, it can also be used directly in the browser. A ESM/MJS version is included in the main async package that should automatically be used with compatible bundlers such as Webpack and Rollup.

    A pure ESM version of Async is available as async-es.

    For Documentation, visit https://caolan.github.io/async/

    For Async v1.5.x documentation, go HERE

    // for use with Node-style callbacks...
    var async = require("async");
    
    var obj = {dev: "/dev.json", test: "/test.json", prod: "/prod.json"};
    var configs = {};
    
    async.forEachOf(obj, (value, key, callback) => {
        fs.readFile(__dirname + value, "utf8", (err, data) => {
            if (err) return callback(err);
            try {
                configs[key] = JSON.parse(data);
            } catch (e) {
                return callback(e);
            }
            callback();
        });
    }, err => {
        if (err) console.error(err.message);
        // configs is now a map of JSON data
        doSomethingWith(configs);
    });
    var async = require("async");
    
    // ...or ES2017 async functions
    async.mapLimit(urls, 5, async function(url) {
        const response = await fetch(url)
        return response.body
    }, (err, results) => {
        if (err) throw err
        // results is now an array of the response bodies
        console.log(results)
    })

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      Install

      npm i async

      DownloadsWeekly Downloads

      44,645,192

      Version

      3.2.1

      License

      MIT

      Unpacked Size

      816 kB

      Total Files

      137

      Last publish

      Collaborators

      • beaugunderson
      • caolan
      • aearly
      • megawac
      • hargasinski