how to trim first 2 digit in javascript code example

Example 1: javascript remove first character from string

let str = " hello";
str = str.substring(1);

Example 2: javascript delete first character in string

var oldStr ="Hello";
var newStr = oldStr.substring(1); //remove first character "ello"

Example 3: javascript remove first character from string

let str = 'ass';

str = str.split(''); // (3) ["a", "s", "s"]
str.shift(); // (2) ["s", "s"]
str = str.join(''); // "ss"