Babel Basic - Javascript

I wasn't able to share yesterday's post due to some work. But yesterday I mainly worked on Babel Basics.

So basically bable is a transpiler used to convert ES6+, javascript version into ES5. we have presets to convert typescript,react into Es5 code as well.Explored about how to use babel plugins and the difference between preset and a plugin and other stuffs. It was very interesting thing to learn.

You can find the series repo here
https://github.com/ganeshraja10/Latest-Tech-Learnings

written code

multiplyBy2 = (arr) => arr.map((item) => item * 2); let arr = [1, 2, 3]; console.log(multiplyBy2(arr)); let element = 22; console.log(element ?? -1); 

After transpiling to Es5

"use strict"; multiplyBy2 = function multiplyBy2(arr) { return arr.map(function (item) { return item * 2; }); }; var arr = [1, 2, 3]; console.log(multiplyBy2(arr)); var element = 22; console.log(element !== null && element !== void 0 ? element : -1);