javascript remove first character from string if code example

Example 1: remove first 3 characters from string javascript

var string = "abcd";
console.log(string.substring(3)); //"d"

Example 2: javascript remove first character from string

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

Example 3: javascript remove first character from string

let str = 's';

str = (function f(s) { // don't use on large strings
  		return s.length<=1?'':f(s.slice(0, -1))+s[s.length-1]
	})(str); // ""