async e await com javascript: entenda e use agora

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Async e Await

entenda e use agora!

Giovanni Bassi•Programador

•MVP

•Não gerente

• Trouxe a Scrum.org, PSM e PSD pro Brasil

•blog.lambda3.com.br, podcast.lambda3.com.br, dotnetarchitects.net, nodebr, dockersp

•@giovannibassi

• Escalador e ciclista

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Toda semana em:

Callbacks

Promises com bibliotecas

(q, bluebird, etc)

Promises e Generators

Async/Await

EcmaScript 1

(ES1 - 1997)

2010

EcmaScript 2015 (ES6)

EcmaScript 2017 (ES8)

Function ExpressionsEcmaScript 3

(ES3 - 1999)

function* fibonacci() {let [fn1, fn2] = [0, 1];while (true) {

yield fn1;[fn1, fn2] = [fn2, fn2 + fn1];

}}

for (const n of fibonacci()) {if (n === 927372692193079200000) break;process.stdout.write(`${n} `);

}

async function f1(){await f3();

}

const f3 = async() => await f2;

const f2 = async function (){await f1();

}

tc39.github.io/ecma262/2017/#sec-async-function-definitions

github.com/tc39/ecmascript-asyncawait

github.com/giggio/asyncawaitsamples

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Dúvidas?

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Obrigado!