get part of string javascript code example

Example 1: how to get the first character of a string in javascript

let str = 'John Wick'
let firstChar = str.charAt(0) 
console.log(firstChar); // "J"

Example 2: get part of string javascript

var str="123 - aaaaa"
var num = str.slice(0,3) //num="123"
var name= str.slice(6) //name="aaaaa"

Example 3: straforma in string js

var x = new String("Una nuova stringa");

Example 4: reactjs cut part of string

var str = "Hello world!";

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

// res value is "ell"