如何正确处理打字稿中的范围 [英] How to properly deal with scope in typescript

问题描述

我对上下文有疑问.处理打字稿中上下文的正确方法是什么?如果我正确理解它，我对闭包有疑问吗?当我在对象(类)中的函数内部调用函数时，那是闭包吗?

I have a question about context. What is to proper way to deal with context in typescript? If I understand it correctly I have a problem with closures? When I'm calling a function inside a function, which is in object (class) then it's a closure right?

但是我必须使用 self = this 还是在打字稿中有更好的方法?因为我真的不喜欢这种解决方案.而且我不想束缚每一件事.

But do I have to use self = this or is there a better way in typescript please? Because I really don't like this solution. And I don't want to bind every little thing.

关于托尔金的例子:

export class SomeClass {
    private declaration;

    constructor() {}

    ngOnInit(){
        var self = this;
        some code
        var interval = setInterval(function() {
            self.someFunction();
        }, 1000);        
    }

    someFunction() {
      something
    }
}

谢谢您的建议

推荐答案

在这种情况下，您可以使用

In this case, you can use the arrow function syntax, which will capture the value of this to refer to the class prototype as you would expect:

ngOnInit() {
    some code
    var interval = setInterval(() => {
        this.someFunction();
    }, 1000);        
}

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