udittyagi

const mediaQueryLists = {}; //Add all MediaQueryList object here.
const keys = Object.keys(queries);
const matches = {}; //contains initial query matches

keys.forEach(media => {
if (typeof queries[media] === 'string') {
/* Adding MediaQueryList object for each and every query to
  mediaQueryLists object
 */
mediaQueryLists[media] = window.matchMedia(queries[media]);

udittyagi

import React from 'react';

import useBreakpoints from './_customHooks/useBreakpoint';

const App = (props) => {

  const point = useBreakpoints();

  return (
    <div>

udittyagi

import {useState, useEffect} from 'react';
import throttle from 'lodash.throttle';

const getDeviceConfig = (width) => {
  if(width < 320) {
    return 'xs';
  } else if(width >= 320 && width < 720 ) {
    return 'sm';
  } else if(width >= 720 && width < 1024) {
    return 'md';

udittyagi

const getDeviceConfig = (width) => {
  if(width < 320) {
    return 'xs'
  } else if(width >= 320 && width < 720 ) {
    return 'sm'
  } else if(width >= 720 && width < 1024) {
    return 'md'
  } else if(width >= 1024) {
    return 'lg'
  }

udittyagi

const fs = require('fs');

const readFileAsArray = (fileName, cb = () => {}) => {
  return new Promise((resolve, reject) => {
    if(typeof fileName !== 'string') {
      process.nextTick(
        cb,
        new TypeError('Argument should be string')
      )
      return reject('Argument should be string')

udittyagi

const fs = require('fs');

const readFileAsArray = (fileName) => {
  return new Promise((resolve, reject) => {
    if(typeof fileName !== 'string') {
      return reject('Argument should be string')
    }

    fs.readFile(fileName, 'utf8', (err, data) => {
      if(err) {

udittyagi

101
102
103
104
105
106

udittyagi

const fs = require('fs');

const readFileAsArray = (fileName, cb) => {
  if(typeof fileName !== 'string') {
    return process.nextTick(
      cb,
      new TypeError('Argument should be string')
    );
  }
  fs.readFile(fileName, 'utf8', (error, data) => {

udittyagi

const doSomething = (cb) => {
  let a = Math.random() * 10;
  if (a < 5) {
    cb(new Error('Number is Too small'));
    return;
  }
  cb(null, a);
};

function callback(error, data) {

udittyagi

console.log('main starting');
const a = require('./a.js');
const b = require('./b.js');
console.log('in main, a.done = %j, b.done = %j', a.done, b.done);