프로토타입 메소드 내에서 setInterval/setTimeout의 \'this\' 참조를 유지하는 방법은 무엇입니까?

Referencing "this" within setInterval/setTimeout in Prototype Methods

While typically, assigning an alternative "self" reference is used to refer to "this" within setInterval, this method may not be feasible for prototype methods. For instance, in the following code:

function Foo() {}
Foo.prototype = {
    bar: function () {
        this.baz();
    },
    baz: function () {
        this.draw();
        requestAnimFrame(this.baz);
    }
};

This code encounters an error because the method call to baz is taken out of context and loses its "this" reference. To resolve this issue, consider the following alternatives:

Anonymous Function Wrapper:

Wrap the method call within an anonymous function to ensure it is called immediately after accessing the baz property, preserving the correct "this" context. However, a helper variable is necessary to store the "this" reference from the outer function.

var that = this;
setInterval(function(){
    return that.baz();
}, 1000);

Fat Arrow Function Wrapper:

If arrow functions are supported, this issue can be addressed more concisely:

setInterval( () => this.baz(), 1000 );

Binding Function:

Utilize a binding function like Function.prototype.bind or its equivalent from a preferred library to preserve the "this" reference:

setInterval( this.baz.bind(this), 1000 );

위 내용은 프로토타입 메소드 내에서 setInterval/setTimeout의 'this' 참조를 유지하는 방법은 무엇입니까?의 상세 내용입니다. 자세한 내용은 PHP 중국어 웹사이트의 기타 관련 기사를 참조하세요!