The JavaScript this Keyword
作者:互联网
https://www.w3schools.com/js/js_this.asp
What is this?
The JavaScript this
keyword refers to the object it belongs to.
It has different values depending on where it is used:
- In a method,
this
refers to the owner object. - Alone,
this
refers to the global object. - In a function,
this
refers to the global object. - In a function, in strict mode,
this
isundefined
. - In an event,
this
refers to the element that received the event. - Methods like
call()
, andapply()
can referthis
to any object.
this in a Method
In an object method, this
refers to the "owner" of the method.
In the example on the top of this page, this
refers to the person object.
The person object is the owner of the fullName method.
fullName : function() {return this.firstName + " " + this.lastName;
}
标签:function,object,Keyword,JavaScript,owner,refers,method 来源: https://www.cnblogs.com/chucklu/p/11095676.html