How to use javascript type conversion_Basic knowledge

(1) Convert to string

Copy code The code is as follows:

X ' '
toString()
String()

Converting a function to a string usually involves outputting the function body, but you can override its toString method

(2) Convert to numbers

Copy code The code is as follows:

parseInt() ,parseFloat()

Use Number() without adding new in front, so it will be converted into an object.

Participate in mathematical operations (except addition)

X: Note that this is not addition

(3) Convert to Boolean value

Automatic conversion: If statements, ||, &&, ! and other logical judgment environments will automatically convert expressions into Boolean values ​​

Force conversion: use!!, use Boolean(), do not add new in front, so it will be converted into an object.

(4) Convert to object

Direct new object name

(5) Summary

Each type has: object name (variable to be converted) conversion method, as well as some independent skills.

JS type conversion, you can refer to the figure below: