Change your old methods for writing a JavaScript Code - Shorthand's for JavaScript Code

We are used to writing JavaScript code for a long time. But we are not updated enough to use an optimized way of coding for JavaScript. With the optimized method of coding, we can be on top of the things which is related to optimized code. With Shorthand methods, lots of things become easy for developers, Like Error tracking, Code management, line of Codes, etc.

1. Shorthand for if with multiple OR(||) conditions

if (car === 'audi' || car === 'BMW' || car === 'Tesla') {    //code}

In a traditional way, we used to write code in the above pattern. but instead of using multiple OR conditions we can simply use an array and includes. Check out the below example.

if (['audi', 'BMW', 'Tesla', 'grapes'].includes(car)) {   //code}

2. Shorthand for if with multiple And(&&) conditions

if(obj && obj.tele && obj.tele.stdcode) {    console.log(obj.tele .stdcode)}

Use optional chaining (?.) to replace this snippet.

console.log(obj?.tele?.stdcode);

3. Shorthand for checking null, undefined, and empty values of variable

if (name !== null || name !== undefined || name !== '') {    let second = name;}

The simple way to do it is...

const second = name || '';

4. Shorthand for switch case to select from multiple options

switch (number) {  case 1:     return 'Case one';  case 2:     return 'Case two';  default:     return;}

Use a map/ object

const data = {  1: 'Case one',  2: 'Case two'};//Access it usingdata[num]

5. Shorthand for functions for single line function

function example(value) {   return 2 * value;}

Use the arrow function

const example = (value) => 2 * value

6. Shorthand for conditionally calling functions

function height() {    console.log('height');}function width() {    console.log('width');}if(type === 'heigth') {    height();} else {    width();}

Simple way

 (type === 'heigth' ? height : width)()

7. Shorthand for To set the default to a variable using if

if(amount === null) {    amount = 0;}if(value === undefined) {    value = 0;}console.log(amount); //0console.log(value); //0

Just Write

console.log(amount || 0); //0console.log(value || 0); //0

8. Shorthand for ifelse statements

let label;if (amt > 0) {    label = 'profit';} else {    label = 'loss';}

Replace it with a ternary operator

const label = amt > 0 ? 'profit' : 'loss';

9. Shorthand for traditional for loops to fetch a value from array

const arr = [1, 2, 3];for(let i=0; i<arr.length; i++) {    console.log(arr[i]);}

Replace for with forEach

const arr = [1, 2, 3];arr.forEach((val) => console.log(val));

10. Shorthand for typecasting, Converting string to number

const num1 = parseInt("100");const num2 =  parseFloat("11.11");

simply use + operator

const num1 = +"100";const num2 =  +"11.11";