Is it safe to resolve a promise multiple times?

Question

I have an i18n service in my application which contains the following code:

var i18nService = function() {
  this.ensureLocaleIsLoaded = function() {
    if( !th         


        

Answer 1

If you need to change the return value of promise, simply return new value in then and chain next then/catch on it

var p1 = new Promise((resolve, reject) => { resolve(1) });
    
var p2 = p1.then(v => {
  console.log("First then, value is", v);
  return 2;
});
    
p2.then(v => {
  console.log("Second then, value is", v);
});