js string cut substring code example

Example 1: javascript get first 2 char

String.substring(0, 2);
//Return the first two characters of the string
//First parameter is the starting index, 0 corresponding to the first character
//Second parameter is the number of character to return

Example 2: remove substring from string javascript

var ret = "data-123".replace('data-','');

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