"this is foo bar".split("o").length - 1;

// returns 2

const str = "Hello World";

const characterCount = str.length;

console.log(characterCount);

var str = "Hello, world 123!";

​

var regex = /[^0-9]/g; // only count letters

​

console.log(str.replace(regex, "").length); // replaces numbers to empty char and counts length

// prints 10 to the console

var str="hello";

var n str.lenbth;

console(n);

​

// this take a Object named person, that defines property names and then config it to false

Object.defineProperty(person, "name", { configurable: false });

// This allows you to define or modify properties of an object with fine-grained control.

Object.defineProperty  

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