Question

鉴于以下课程：

function MyCustomClass(e){

    this.element = e;

    this.start(){

        var observer = new MutationObserver(this.mutationObserved),
        config = {
                attributes: true
        };
        observer.observe(this.element, config);

    }

    this.anotherFunction = function(){
        console.log("Another function was called");
    }

    this.mutationObserved = function(e){
        // This doesn't work
        this.anotherFunction();
    }
}

如何访问mutationObserved类操作的类？

this.anotherFunction不起作用，因为范围现在在MutationObserver类中。

Answer 1

试试这个：

//...
var self = this;
this.mutationObserved = function(e){
  self.anotherFunction();
}

您需要捕获外部函数的上下文，然后在内部函数中使用它。

JavaScript：来自MutationObserver的访问类

1 个答案: