javascript wait for function to finish execution before continuing

Question

I am trying to set a global variable within a function, but the code continues before the variable has been updated. e.g.

        var username = 'Example';
	const fetch = require('node-fetch');
	var num = 1234;
	var uuidP;
	const request = async () => {
		const response = await fetch(`https://api.mojang.com/users/profiles/minecraft/${username}`);
		const json = await response.json();
		uuidP = json.id;
	}
	request();

	console.log(num); //returns 1234
	console.log(uuidP); //returns udefined

Possible duplicate of How can I make a program wait for a variable change in javascript? — Rojo
– Rojo, Commented Oct 17, 2019 at 1:54

Paul · Accepted Answer · 2019-10-17 02:04:16Z

1

Javascript is heavily optimised. You need to declare the update() function is asynchronous, and then use a Promise to await the response of the update. Have a look at this example.

answered Oct 17, 2019 at 2:04

Paul

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