How to calculate length of a string in javascript?

You can calculate the length of a string in JavaScript using the .length property. For example: 

const myString = "Hello, World!";
const length = myString.length;
// 'length' will be 13 in this case

The length of a string in JavaScript can be found using the . length property. Since . length is a property it must be called through an instance of a string class.