Re-launch the same function when a child-process is closed

Question

I'm working with a js class and I want that when the child_process this.youtube is closed, the function MainFunction() restarts again;

I know that, if you're inside of other functions, you can invoke this function with this.MainFunction(), so I tried the same putting it into the same function but I get the eror this.MainFunction() is not a function

Here's my code

const childprocess = require('child_process')
class Something {
    constructor(){

    }
    async MainFunction(){
        this.youtube=childprocess.spawn('C:/Program Files (x86)/Google/Chrome/Application/chrome.exe',["https://www.youtube.com/"]);
        this.youtube.on('close',function(){
            this.MainFunction()
        })
    }
}
module.exports = Something

score 1 · Accepted Answer · answered Jan 28 '20 at 11:53

It's because of the context which this inside function refers to. If you want it to refer to the Something class, then change the callback to arrow function:

this.youtube.on('close',() => {
    this.MainFunction()
})

More on how this works can be found in this great post.

Re-launch the same function when a child-process is closed

1 Answers1