The usage of bind is
to define a specified scope for called function. Because the key
this is easy to refer another objet,
experically window, instead of itself. Please pay attention to look at the
following example:
1 //Global variables
2 window.name="Chromium";
3
4 var person={
5 name:"Pin"
6 }
7
8 function say()
9 {
10 alert("My name is "+this.name+"!");
11 }
12
13 say(); //the result is : My name is Chromium!
14
15 var sayfunction=say.bind(person);
16
17 sayfunction(); //the result is : My name is Pin!
When the function say assign to a
variable sayfunction, the scope of
this function has been changed. However, if you use the function of bind
to refer a specified object person, the scope will own the refer
object person.
How to use the function of bind,布布扣,bubuko.com
时间: 2024-10-27 04:35:11