wtfjs

What the f\ck JavaScript?

Node Packaged Manuscript

Translations

Table of Contents

💪🏻 Motivation

✍🏻 Notation

👀 Examples

`[]` is equal `![]`

`true` is not equal `![]`, but not equal `[]` too

true is false

baNaNa

`NaN` is not a `NaN`

`Object.is()` and `===` weird cases

It's a fail

`[]` is truthy, but not `true`

`null` is falsy, but not `false`

`document.all` is an object, but it is undefined

Minimal value is greater than zero

function is not a function

Adding arrays

Trailing commas in array

Array equality is a monster

`undefined` and `Number`

`parseInt` is a bad guy

Math with `true` and `false`

HTML comments are valid in JavaScript

Chaining assignments on object

Accessing object properties with arrays

`Number.toFixed()` display different numbers

`Math.max()` less than `Math.min()`

Comparing `null` to `0`

Same variable redeclaration

Default behavior Array.prototype.sort()

resolve() won't return Promise instance

`{}{}` is undefined

`arguments` binding

An `alert` from hell

An infinite timeout

A `setTimeout` object

Double dot

Extra Newness

Why you should use semicolons

Split a string by a space

A stringified string

Non-strict comparison of a number to `true`

📚 Other resources

🤝 Supporting

🎓 License