Get Promise data out of it Javascript

Question

I try this:

var result = [];
promise.then(function (data) {
  result.push(data);

});
console.log(result)

and the result array is empty. Is there a way to get it out of the promise?

what's the `promise` show more code. Where did you define `promise` — Edwin Reynoso, May 06 '15 at 12:14
Damn. Usually we answer this question by telling to use promises... — Denys Séguret, May 06 '15 at 12:14
Where are you running your code? Are you using any tools like babel-js? What are you tagetting? — Benjamin Gruenbaum, May 06 '15 at 12:16
Never mind then I don't get the question, I thought he was asking why is `result` empty — Edwin Reynoso, May 06 '15 at 12:17

score 1 · Answer 1 · edited May 23 '17 at 12:30

1

No, you can't.

The point of promises is to allow a simple chaining of actions, some of them asynchronous.

You may do

var result = [];
promise.then(function (data) {
    result.push(data);
}).then(function(){
    console.log(result)
});

I'd suggest you to read this introduction to promises.

edited May 23 '17 at 12:30

Community

1
1

answered May 06 '15 at 12:16

Denys Séguret

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score 1 · Answer 2 · answered May 06 '15 at 12:27

Promises are sometimes referred to as futures or future values. You can't directly get the value out of the promise but you can get a promise of a future value, as seen below.

var futureResult = promise.then(function (data) {
    var result = [];
    result.push(data);
    return result;
});

futureResult.then(function (result) {
    console.log(result);
});

futureResult.then(function (result) {
    console.log('another logger');
    console.log(result);
});

Get Promise data out of it Javascript

2 Answers2