Question

i have the following object. i´m trying to reach the variable b from inside the callback of setTimeout but it doesn’t work. i know that the callback of setTimeout only knows the variables of the its surrounding function, so how can i reach the this.b? thank you!

function someFunc() {
    this.a = 10;
    this.b = 20;
    this.func = function() {
                this.c = 50;
        console.log("a = " + this.a);  //works
        var time = setTimeout(function() {
            console.log("b = " + someFunc.b);   //this.b doesn't work
            console.log("C = " + this.c);  //why this doesn't work also? says undefined
        },1000);
    }
}

var m = new someFunc();
m.func();

Answer 1

function someFunc() {
    this.a = 10;
    this.b = 20;
    var mySomeFunc = this;
    this.func = function() {
        console.log("a = " + this.a);  //works
        var time = setTimeout(function() {
            console.log("b = " + mySomeFunc.b);
        },1000);
    }
}