Ecmascript object (JavaScript)

Generally, three types of objects can be created and used:

 

1. Native object)

 

Definition: objects provided by ecmascript implementation independent of the host environment

(Actually the class defined by the ECMA-262)

 

Object Function Array string Boolean number date Regexp error evalerror rangeerror

Referenceerror syntaxerror typeerror urierror

 

 

 

 

2. build-in object)

(In fact, both built-in and local objects do not need to be instantiated because they have been instantiated)

ECMAscript-262 only defines two built-in objects

Global, math

 

 

3. Host Object

 

All non-local objects are host objects (in fact, all BOM and DOM objects are host objects)