JavaScript type Conversion Use method _ Basics

(i) Convert to string

Copy Code code as follows:

X + ""
ToString ()
String ()

A function is converted to a string that typically outputs a function body, but can override its ToString method

(ii) conversion to digital

Copy Code code as follows:

parseint (), parsefloat ()

Use number (), do not add new before, so it is converted to an object.

Participate in mathematical operations (except addition)

+ X: Note that this is not an addition

(iii) conversion to Boolean value

Automatic conversion: If statements, | |,&&,! and other logical judgments will automatically convert an expression to a Boolean value in the environment

Cast: Use!!, use Boolean (), do not add new before, so it is converted to an object.

(iv) Conversion to object

Direct new+ Object Name

(v) Summary

All types have: object names (variables to be converted) conversion methods, as well as some of their own independent skills.

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