markdown 常用的JavaScript Concept.md

Posted 2021-05-05

# Commonly Used JavaScript Concept

1. You can find everything from here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects
2. Here I list commonly used JavaScript concepts, treat it as cheetsheet for quick learn.

## Value

| Value | Note |
| --- | --- |
| NaN | not a number |
| undefined | |
| null | *null is actually a object type* |

## Function

* parseInt
* parseFloat
* isNaN

## Fundamental Object

* Object
* Function
* Boolean
* Error
* ReferenceError
* SyntaxError
* TypeError

## Number and Date

* Number
* Math
* Date

## Text Processing

* String
* RegExp, // it is very useful

## Collection

* Array
* Map
* Set

## Data Flow

* JSON
* Promise
* AsyncFunction