Javascript 在匿名 function 中获取父级的属性

Question

I have a function that calls different functions inside of itself. I need the inner functions to access a property of the parent function. The code looks like this:

function runFuncWithExtraProperty(fn) {
    fn.insertedProperty = 'myProperty';
    fn();
}

I need the functions that run inside of fn to be able to access the property I set on fn . fn could look like this:

function fn() {
    () => {
        console.log(this.insertedProperty);
    };
}

Does anyone know how I would accomplish something like this so I can add extra properties that can be used by the inner functions? Thanks!

Answer 1

In your code, the console.log never gets called. Below, I make it get called, and I change this to fn :

 function fn() { (() => { console.log(fn.insertedProperty); })(); } function runFuncWithExtraProperty(fn) { fn.insertedProperty = 'myProperty'; fn(); } runFuncWithExtraProperty(fn);