Make a given Function do nothing at its first call
import feint from 'feint';
const fn = feint(() => 1);
fn(); //=> undefined
fn(); //=> 1
fn(); //=> 1Use [npm]https://docs.npmjs.com/about-npm/).
npm install feint
import feint from 'feint';fn: Function
Return: Function
It returns a new Function that does nothing when it's called for the first time. From the second time on, the function performs normally.
import {existsSync, mkdirSync} from 'fs';
import feint from 'feint';
const feintMkdir = feint(mkdirSync);
feintMkdir('foo');
existsSync('foo'); //=> false
feintMkdir('foo');
existsSync('foo'); //=> trueISC License © 2018 - 2019 Watanabe Shinnosuke