PromiseToRetry 
Utility functions that helps dealing with Javascript Promises.
-
ensure(fn => Promise, cb)is a helper function to retry some action returning Promise until it succeeds. -
setTimeoutToPromise(fn => Promise, wait)waits for specified amount of time before invoking your function. Resolves with promise resulting from provided fn. -
new Queue().queue(fn => Promise)invokes functions one by one (waits for firstly enqueued functions to resolve their results)
Usage:
bower install --save promise-to-retry
<link rel="import" href="bower_components/promise-to-retry/promise-to-retry.html">PromiseToRetry.ensure(function() {
// return your promise that might fail,
// etc. instead of this it could do Promise.reject
return Promise.resolve('ensured');
})
.then(function(result) {
console.log(result); // 'ensured'
})
.catch(function(error) {
// this can never happen
});
PromiseToRetry.setTimeoutToPromise(function() {
// this is delayed by 1000ms
return Promise.resolve('delayed');
}, 1000)
.then(function(result)) {
console.log(result); // 'delayed'
}
.catch(function(error) {
// this can still happen
});
var queue = new PromiseToRetry.Queue();
var first = queue.queue(() => new Promise(...));
queue.queue(() => {
// this will not get called until first promise resolves
return Promise.resolve('second');
});