Message from JavaScript discussions

November 2018

— Aka normal scoping

—

var test = function() {
    this.a = function() {
        return this;
    };
    this.b = (() => this);
};
var a = new test();
var b = a.b;

if (a.b() === b()) {
    console.log('It is bound');
}

— No...

— Run it🤤

— You're testing the same function against itself

— You never run a

— It behaves like a function that is bound to the parent this, but it's not bound

— Because it doesn't have its own context

— a is normal, and we talk about arrow function test

—

var test = function() {
    this.a = (function(me) {
        return function() {
            return me;
        }
    })(this);;
    this.b = (() => this);
};

var test = new test();
var a = test.a;
var b = test.b;

if (test.a() === b() && test.b() === a() && a() === b()) {
    console.log('It is bound!!!!!!!!!!!');
}

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— Language:

js

Source:

var test = function() {
    this.a = (function(me) {
        return function() {
            return me;
        }
    })(this);;
    this.b = (() => this);
};

var test = new test();
var a = test.a;
var b = test.b;

if (test.a() === b() && test.b() ===

Errors:

source_file.js:15
});
^

SyntaxError: Unexpected token }
    at exports.runInThisContext (vm.js:53:16)
    at Module._compile (module.js:374:25)
    at Object.Module._extensions..js (module.js:417:10)
    at Module.load (module.js:344:32)
    at Function.Module._load (module.js:301:12)
    at Function.Module.runMain (module.js:442:10)
    at startup (node.js:136:18)
    at node.js:966:3

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— 🤣