how to remove a substring from a string in js code example

Example 1: How to remove text from a string in javscript

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

Example 2: remove substring from string javascript

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

Example 3: how to remove part of string in javascript

var str = "test_23";
alert(str.split("_").pop());
// -> 23

var str2 = "adifferenttest_153";
alert(str2.split("_").pop());
// -> 153