substring from string javascript code example

Example 1: js substring

// the substring method returns a string out of another string

const str = 'Mozilla';

console.log(str.substring(1, 3));
// expected output: "oz"

console.log(str.substring(2));
// expected output: "zilla"

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: cut string from string javascript

var ret = "data-123".replace('data-','');
console.log(ret);   //prints: 123