Random-Callback

Request a function execution based on randomness and a given chance.

Example

import randomCallback from 'random-callback';

const callback = function (message) {
    console.log(message);
};

let hasBeenCalled;

hasBeenCalled = randomCallback(callback, 1, 'I will be called for sure'); // logs 'I will be called for sure'
console.log(hasBeenCalled); // true

hasBeenCalled = randomCallback(callback, 0, 'I won\'t be called'); // logs nothing
console.log(hasBeenCalled); // false

hasBeenCalled = randomCallback(callback, 0.5, 'I will be called with a chance of 50%');
console.log(hasBeenCalled); // true | false

hasBeenCalled = randomCallback(callback, Math.random(), 'I will be called completly random');
console.log(hasBeenCalled); // true | false

API

randomCallback(callback: Function, chance: number, ...args: any[]): boolean

• callback – the function to execute.
• chance (optional) – a number between 0 and 1. Default value is 0.5. A chance of 0 will never execute the function, while a chance of 1 will always execute it. With a chance of 0.5 the function will be executed in around 50% of calls.
  Numbers smaller than 0 will be treated as 0, numbers greater than 1 will be treated as 1.
• All following parameters will be passed as arguments to the function.

If callback is not a function or chance is not a number a TypeError will be thrown.

The callback will always be executed with the global context (global in NodeJS environments and window in the browser environment).

Returns a boolean which indicates if the function was executed.

Randomness

Randomness is based on Math.random() so don't take it too serious.