js substring example

Example 1: substring javascript

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

Example 2: javascript substring

// zero-based index, 'end' is excluded from result
myString.substring( start, end )

Example 3: cut string from string javascript

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