JSFiddle - React, Tailwind, and code Playground

JavaScript

//Test JavaScript Type Conversion

console.log(10 + " cats");//10 cats
console.log(10 * " cats");//NaN, " cats" will be converted to NaN
console.log(10 + "2");//102
console.log(10 - "2");//8
console.log(10 / "2");//5
console.log(10 * "2");//20
console.log(10 * " 2");//20
console.log("10" * "2");//20

console.log(10 * " 3 ");//30
console.log(10 * "3 m");//NaN, "3 m" will be converted to NaN

console.log(Object(undefined));//empty object
console.log(Object(null));//empty object

console.log(undefined == false);//false
console.log(Boolean(undefined) == Boolean(false));//true

console.log(false + "");//"false"
console.log(+false);//0
console.log(!!3);//true