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promise-series-node
Advanced tools
Execute array of methods that return promises, in series.
$ npm install promise-series
var promiseSeries = require('promise-series');
var func1 = function() {
return new Promise(function(resolve, reject) {
resolve('hello');
});
};
var func2 = function() {
return new Promise(function(resolve, reject) {
resolve('world');
});
};
promiseSeries([func1, func2]).then( (results) => {
console.log(results);
});
This will print:
['hello', 'world'] //results are returned in the order they were executed
Optionally, you make choose to provide a callback that is run against each result. If the test fails, the subsequent functions in the series will not be executed, and the series will resolve immediately.
var func1 = function() {
return new Promise(function(resolve, reject) {
resolve(true);
});
};
var func2 = function() {
return new Promise(function(resolve, reject) {
resolve(false);
});
};
var func3 = function() {
return new Promise(function(resolve, reject) {
resolve(true);
});
};
promiseSeries([func1, func2, func3], function(res) {
return res === true; //only promises that resolve(true) pass the test
}).then( (data) => {
console.log(results);
});
This will print:
//note that func3 is not included, because func2 failed before it ran
//also note that results include the failed result
[true, false]
If a function does not return a promise, the return value will be passed through to the results:
var nonPromiseFunc = function() {
return 'cruel';
};
promiseSeries([func1, nonPromiseFunc, func2]).then( (data) => {
console.log(results);
});
This will print:
['hello', 'cruel', 'world']
If one of the inputs is not a function, the input will be passed through to the results:
promiseSeries([func1, 'foo', 42, func2]).then( (data) => {
console.log(results);
});
This will print:
['hello', 'foo', 42, 'world']
FAQs
Execute methods that return promises in series
The npm package promise-series-node receives a total of 11 weekly downloads. As such, promise-series-node popularity was classified as not popular.
We found that promise-series-node demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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