Package Exports

@andrewcaires/utils.js
@andrewcaires/utils.js/dist/index.esm.js
@andrewcaires/utils.js/dist/index.umd.js

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@andrewcaires/utils.js) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

utils.js

JavaScript utility library for web and nodejs development

Installation

npm i @andrewcaires/utils.js

Api

EventEmitter

Class for custom events

import { EventEmitter } from '@andrewcaires/utils.js';

const emitter = new EventEmitter();

// OR

class CustomEvent extends EventEmitter {}

const custom = new CustomEvent();

EventEmitter.on Adds the listener function to the end of the listeners array for the event named

const cb = (data) => {

  console.log(data);
}

emitter.on('event', cb);

EventEmitter.once Adds the listener function to the end of the listeners array for the event named. The next time event is triggered, this listener is removed

const cb = (data) => {

  console.log(data);
}

emitter.once('event', cb);

EventEmitter.off Removes the specified listener from the listener array for the event named

emitter.off('event', cb);

EventEmitter.emit Synchronously calls each of the listeners registered for the event named

emitter.emit('event', 'on emit event');

type

Determine the internal JavaScript [[Class]] of an object

import { isArray, isBoolean, isFunction, isNumber, isObject, isString, isFloat, isInteger, isNull, isUndefined, isValid, type } from '@andrewcaires/utils.js';

isArray Finds whether a variable is an array

isArray([]) // > true

isBoolean Finds out whether a variable is a boolean

isBoolean(true) // > true
isBoolean(false) // > true

isDef Find out if a variable has been defined

isDef(any) // > true

isFunction Find whether the type of a variable is function

isFunction(function() {}) // > true

isNumber Finds whether a variable is an number

isNumber(1) // > true
isNumber(1.7) // > true

isObject Finds whether a variable is an object

isObject({}) // > true

isString Find whether the type of a variable is string

isString('') // > true

isFloat Finds whether the type of a variable is float

isFloat(1.7) // > true

isInteger Find whether the type of a variable is integer

isInteger(1) // > true

isNull Finds whether a variable is null

isNull(null) // > true

isUndefined Finds whether a variable is undefined

isUndefined(undefined) // > true

type Get the type of a variable

type([]); // => 'array'

type(true); // => 'boolean'
type(false); // => 'boolean'

type(frunction() {}); // => 'function'

type(1); // => 'number'
type(1.7); // => 'number'

type({}); // => 'object'

type(''); // => 'string'
type('test'); // => 'string'

type(); // => 'null'
type(null); // => 'null'

JSPM

@andrewcaires/utils.js