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

I faced the same thing a while ago, indeed a promise can be only resolved once, another tries will do nothing (no error, no warning, no then invocation).

I decided to work it around like this:

getUsers(users => showThem(users));

getUsers(callback){
    callback(getCachedUsers())
    api.getUsers().then(users => callback(users))
}

just pass your function as a callback and invoke it as many times you wish! Hope that makes sense.