Promise Tool

A promised library of tools for Node.js and the browser.

Install

npm install promise-tool --save

API

• PromiseTool.lift() Lifts a callback style function or prototype object and converts to a promise/s first argument must be an error.

• PromiseTool.series A given task will not be started until the preceding task completes.

  • tasks The array of functions to execute in series.
    • task A function which returns a promise.
      • resolve(result) A result which will be appended to the end of each task/function as parameter.
  • parameters An Array of parameters to be passed to each task/function. Optional

• PromiseTool.setTimeout

  • delay The number of milliseconds to wait before calling resolve.
  • ...args Optional arguments to pass when the resolve is executed.

• PromiseTool.setInterval

  • delay The number of milliseconds to wait before calling resolve.
  • method A function that repeats on each interval. This function will fire upon each interval unless one of the following returns are implemented.
    • Return Value Actions
      • result Any valid JavaScript error type. Will fire the reject and pass the error.
      • result A boolean that calls resolve if true or reject if false.
      • result Any thing returned besides null, undefined, false, and a valid Error type will resolve with that return value as the first argument.
      • result <Null, Undefined> Both are ignored and will not trigger the resolve or reject.
  • ...args Optional arguments to pass when the resolve is executed.

• PromiseTool.setImmediate

  • ...args Optional arguments to pass when the resolve is executed.

• PromiseTool.clearTimeout

  • timeout A Timeout object as returned by setInterval().

• PromiseTool.clearInterval

  • interval A Interval object as returned by setInterval().

• PromiseTool.clearImmediate

  • immediate An Immediate object as returned by setImmediate().

Examples

Series

var PromiseTool = require('../index.js');

function a (one, two) {
	return new Promise (function (resolve) {
		setTimeout(function () {
			return resolve(`a-${one}${two}`);
		}, 900);
	});
}

function b (one, two, result) {
	return new Promise (function (resolve) {
		setTimeout(function () {
			result = `${result} b-${one}${two}`;
			return resolve(result);
		}, 600);
	});
}

PromiseTool.series([a, b], [1, 2]).then(function (result) {
	console.log(result); // a-12 b-12
});

Timers

var PromiseTool = require('promise-timers');
var delay = 500;

PromiseTool.setTimeout(delay).then(function (args) {
	// this refers to timeout
	console.log(args);
	console.log('timeout done');
});

var i = 0;

function method () {
	// this refers to interval
	if (i > 5) {
		return true;
	} else {
		console.log(i);
		i++;
	}
};

 PromiseTool.setInterval(delay, method).then(function (args) {
	// this refers to interval
	console.log(args);
	console.log('interval done');
});

PromiseTool.setImmediate().then(function (args) {
	// this refers to immediate
   console.log(args);
   console.log('immediate done');
});

Authors

AlexanderElias

License

Why You Should Choose MPL-2.0 This project is licensed under the MPL-2.0 License