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es6-cheatsheet's Introduction

HOW'S YOUR ES6, ES2016, AND ES2017?

Learn enough modern JavaScript to get by with this interactive cheatsheet.

This is an interactive ES6, ES2016, and ES2017 cheatsheet. It uses a series of small examples to show you the important parts of modern JavaScript. All code is editable and runnable so you can play with it all you want.

Many of my readers and workshop attendees complained that modern JavaScript looks weird at first. They could understand what I was saying, but couldn't read the code. So I built this cheatsheet to fix that.

In 5 minutes you will be able to read and understand modern JavaScript code. Using it on your own might take longer, but you can do it! :) Come back any time you're stuck.

👉 https://es2017.io

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mjurincic lizlam sethips

es6-cheatsheet's Issues

Couple of code example booboos

Hi @Swizec, thanks a lot for yr cheatsheet, really concise and clear! I'm too broke to donate, but i did notice a couple of mistakes...

  • The last code example in the Spread Operator section has something about childObj?
// alternative to Object.assign
// 

let obj = { a: 1, b: 2 };

obj = { ...obj, 
        c: 3 
      }

console.log(obj) // {"a":1,"b":2,"c":3,"childObj":{"d":4,"e":5}}
  • Also, in yr Promises section the last code example is about async error handling, not promises reject.

All the best.

startPad() example not informative

Hi

The example given for the startPad does not print the padded version of hours.

const hours = String(new Date().getHours()),
      minutes = String(new Date().getMinutes());

hours.padStart(2, "0");
minutes.padStart(3, "0");

console.log(`${hours}:${minutes}`) // 09:05

let a = {a: '1'}

console.log({ a })

I suggest changing it to this

const hours = String(new Date().getHours()),
      minutes = String(new Date().getMinutes());

const paddedHours = hours.padStart(2, "0");
const paddedMinutes = minutes.padStart(3, "0");

console.log(`${hours}:${minutes}`) // 9:15
console.log(`${paddedHours}:${paddedMinutes}`) // 09:015

let a = {a: '1'}

console.log({ a })

Also why is there console.log({ a }) there?

Can't open a direct PR since the code is at your CodePen

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