bind in javascript

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showing results for - "bind in javascript"
Enrico
08 Aug 2020
1"Variables has local and global scopes. Let's suppose that we have two variables
2with the same name. One is globally defined and the other is defined inside a
3function closure and we want to get the variable value which is inside the
4function closure. In that case we use this bind() method.
5
6code:
7
8var x = 9; // this refers to global "window" object here in the browser
9
10var person = {
11  x: 81, // local variable x = 81
12  getX: function() {
13    return this.x; // "this" = person , so this.x is the same as  person.x
14  }
15};
16//  the next line of code is the most important one (line 17)
17var y = person.getX; // It will return 9, because it will call global value of x(var x=9).
18
19var myFunc = y.bind(person); // It will return 81, because it will call local value of x, which is defined in the object called person(x=81).
20
21y(); // return 9 (the global variable);
22
23myFunc();" // return 81 (the loacl variable);
24
source
Evan
02 Jul 2018
1bind() returns a bound function that, when executed later, will have the correct context ("this") for calling the original function.
source
Louka
24 Aug 2020
1func.bind(this)
Leni
07 Feb 2016
1<html>
2<input type="button" id="btnSubmit" name="btnName" class="btnclass" value="Click Me" />
3</html>
4
5$('input[name="btnName"]').click(function(){
6    //do stuff
7});
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