Sleep in JavaScript - delay between actions

Question

Is there a way I can do a sleep in JavaScript before it carries out another action?

Example:

 var a = 1+3;
 // Sleep 3 seconds before the next action         


        

Answer 1

Another way to do it is by using Promise and setTimeout (note that you need to be inside a function and set it as asynchronous with the async keyword) :

async yourAsynchronousFunction () {

    var a = 1+3;

    await new Promise( (resolve) => {
        setTimeout( () => { resolve(); }, 3000);
    }

    var b = a + 4;

}