New Global Methods
ES6 added 2 new global number methods:
- isFinite() Method: It checks if a value is a finite number, returning true for numbers, excluding NaN and Infinity.
- isNaN() Method: It checks if a value is Not-a-Number (NaN), returning true if it’s NaN, false otherwise.
Example: In this example we are using the above-mentioned methods.
Javascript
const var1 = 12; const var2 = "Geeks"; const var3 = NaN; const var4 = Infinity; console.log(isFinite(var1)); console.log(isFinite(var2)); console.log(isNaN(var1)); console.log(isNaN(var2)); console.log(isNaN(var3)); console.log(isFinite(var3)); console.log(isFinite(var4)); |
Output
true false false true true false false
JS 2015 or ECMAScript 6 (ES6)
JS 2015 (ES6) also known as ECMAScript 6 (ES6), ECMAScript 6 (ES6) is a significant update to JavaScript, introducing arrow functions, classes, template literals, let and const for variable declaration, enhanced object literals, destructuring, and more modern features for better code organization and readability.