javascript remove part of string code example

Example 1: remove substring from string javascript

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

Example 2: how to remove first character from string in javascript

str = str.substring(1);

Example 3: js remove string from string

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

Example 4: 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

Example 5: reactjs cut part of string

var str = "Hello world!";

var res = str.substring(1, 4);

// res value is "ell"