Thethiskeyword refers todifferent objectsdepending on how it is used: In an object method,thisrefers to theobject. Alone,thisrefers to theglobal object. In a function,thisrefers to theglobal object. In a function, in strict mode,thisisundefined. ...
thethiskeyword refers to anobject. 但究竟指向哪个object要看this在哪里被调用或者如何被调用 在对象方法object中,指向对象 单独调用时,指向global 在函数function中,严格模式下为undefined,非严格模式下指向global 在事件event中,指向接受该事件的元素(比如一个监听事件addEventListener,指向绑定该事件的元素) 可以通过bin...
Thethiskeyword refers to the current instance of the class and is also used as a modifier of the first parameter of an extension method. Note This article discusses the use ofthiswith class instances. For more information about its use in extension methods, seeExtension Methods. ...
The this keyword refers to the current instance of the class and is also used as a modifier of the first parameter of an extension method. Note This article discusses the use of this with class instances. For more information about its use in extension methods, see Extension Methods. The fo...
Even inside of nested functions, because none of these functions are methods, the JavaScript “this” keyword refers to the window object. And “this.music” is the same as “window.music”, which is equal to “classical”. Example # 4 var music = 'classical', 1 var music = 'classical...
In strict mode, JavaScript this keyword refers to the global window context. But, within a function, it returnsundefined. javascript-this-in-strict-mode.html "use strict";letobj =this;// 'this' is 'window' objectconsole.log(obj);functiongetContext() {returnthis; }// In...
The JavaScript "this" keyword refers to the object it belongs to. It has different values depending on where it is used: 1) In a method, this refers to the owner object. 2) Alone, this refers to the global object. 3) In a function, this refers to the global object. 4) In a fun...
The 'this' keyword can lead to a lot of confusion in JS. So can function calls without parenthesis. What's the idea behind this.someFunction.bind(this)?
Thethiskeyword provides a predefined qualifier that refers to thecontainer(the main logic part) that holds the current function. Consider the following situation: A program declares a global variable namedrunningTotal, then, from themain()function, calls the functiongetCustomer(). That function decla...
JavaScript 'this' keyword: Here, we are going to learn about the 'this' keyword in JavaScript with examples.