call-if

A micro-library of functions that call a given function if a given condition is met.

This library was created for both convenience purposes and for the cleaner code that can be produced by using its provided functions.

NOTE: Compatible with ES4+ browsers, AMD, CommonJS, ES6 Imports, and HTML script references.

Changelog

Install

$ npm i --save call-if

Usage

import { callIf, callIfOrNull } from 'call-if';


function myFunc(valueToPrint, valueToReturn) {
  console.log(valueToPrint);

  return valueToReturn;
}


callIf(true, myFunc, "Fish fingers and custard", 42);  // Prints "Fish fingers and custard" & returns 42
callIf(false, myFunc, "Fish fingers and custard", 42); // Prints nothing and returns `undefined`

callIfOrNull(true, myFunc, "Fish fingers and custard", 42);  // Prints "Fish fingers and custard" & returns 42
callIfOrNull(false, myFunc, "Fish fingers and custard", 42); // Prints nothing and returns `null`

API

callIf(condition, func, [...funcParams])

Returns the result of calling func if given condition evaluates to true; otherwise, returns undefined.

• condition ?Boolean

  Condition used to determine whether to call end return the result of func or undefined.

• func Function

  Function to be called if condition evaluates to true.

• ...funcParams ?...*

  Parameters to be passed to func, if called.

callIfOrNull(condition, func, [...funcParams])

Returns the result of calling func if given condition evaluates to true; otherwise, returns null.

• condition ?Boolean

  Condition used to determine whether to call end return the result of func or null.

• func Function

  Function to be called if condition evaluates to true.

• ...funcParams ?...*

  Parameters to be passed to func, if called.

License

ISC License (ISC)

Copyright (c) 2018, Brandon D. Sara (http://bsara.pro/)

Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.