javascript is substring code example

Example 1: check for substring javascript

const string = "javascript";
const substring = "script";

console.log(string.includes(substring));  //true

Example 2: javascript get first 10 characters of string

var str = "Hello world That is reallly neat!";
var res = str.substring(0, 5);//get first 5 chars

Example 3: substring javascript

var str = "Hello world!";
var res = str.substring(1, 4); //ell

Example 4: .includes( string

var str = "Hello world, welcome to the universe.";
var n = str.includes("world");

Example 5: How to check whether a string contains a substring in JavaScript?

var str = "Hello world, welcome to the universe.";
var n = str.includes("world");

Example 6: js .substring

let anyString = 'Mozilla'

// Displays 'M'
console.log(anyString.substring(0, 1))
console.log(anyString.substring(1, 0))

// Displays 'Mozill'
console.log(anyString.substring(0, 6))

// Displays 'lla'
console.log(anyString.substring(4))
console.log(anyString.substring(4, 7))
console.log(anyString.substring(7, 4))

// Displays 'Mozilla'
console.log(anyString.substring(0, 7))
console.log(anyString.substring(0, 10))