I do know that in javascript, when you use"this"keyword inside a function, then"this"would refer to the 'owner' of that function according toQuirksmode website. Therefore when we have a function and we use"this"inside it, then"this"refers to the global (window) object. I am a li...
I have a decent understanding of the "this" keyword, but for some reason it's still tripping me up in this specific case. Inside the bindEvents method, when I'm binding the submit event to the form, it then executes fetchTweets. I understand that now that it's inside a callback fun...
正如代词"he"用于引用存于context中无歧义的名词一样,this关键字用于引用一个对象,而这个对象就是function(在该函数中,使用了this指针)所绑定的对象.(the this keyword is similarly used to refer to an object that the function(where this is used) is bound to.) t this基础 什么是执行上下文(execution c...
functiongreet(){// this inside function// this refers to the global objectconsole.log(this); } greet();// Window {} Run Code 3. this Inside Constructor Function In JavaScript,constructor functionsare used to create objects. When a function is used as a constructor function,thisrefers to th...
// function -> global (window, global) ex1 constvideo = {title:'a', play() {console.log(this) } } video.stop =function(){console.log(this) } video.play()// play is a method in the video object// "this" reference this object itselfvideo.stop()// stope is the method in the ...
function doSomething() { this.style.color = '#cc0000'; } 在JavaScript中this是始终指向正在被执行的方法的“owner”(宿主),或者是包含这个方法的对象本身。如果我们在某个页面中定义了一个doSomething()函数,那么这个方法的owner则是这个页面,即当前window对象或JavaScript的全局对象。举个例子来说:一个“oncli...
function bar() { alert(this); } bar(); // global - 因为bar方法被调用时属于 global 对象 var foo = { baz: function() { alert(this); } } foo.baz(); // foo - 因为baz()方法被调用时术语foo对象 如果this就这么简单,那上面的代码就足够了。我们可以进一步使事情变得复杂,通过不同的调用语法...
this是Javascript语言的一个关键字。 它代表函数运行时,自动生成的一个内部对象,只能在函数内部使用。比如, function test(){ this.x = 1; } 随着函数使用场合的不同,this的值会发生变化。但是有一个总的原则,那就是this指的是,调用函数的那个对象。
hljs-keyword">function() { console.log(this) }.bind(this), 1000)}const me = new person("Kingsley") // returns the me object 通过上述修改，回调中的 this 将指向与构造函数（me 对象）相同的 this。解决回调函数中 this 问题的第二种方法...
The first thing you need to ask yourself whenever you're trying to figure out what the this-keyword is, is this question.Where is this function invoked? We won't know what the this-keyword is in a function until that function is invoked. ...