๐Ÿš€ JavaScript Functions: Arrow Functions, Callbacks, and Closures ๐Ÿ“œ

Erasmus Kotoka - Sep 17 - - Dev Community

Hey, JavaScript enthusiasts! ๐ŸŒŸ Ready to dive into the world of functions?

Letโ€™s break it down with some cool concepts youโ€™ll use all the time!

  1. Arrow Functions โžก๏ธ

Say goodbye to long function syntax! Arrow functions are short and sweet ๐Ÿ˜Ž.

Plus, they handle this a bit differently.


const add = (a, b) => a + b;

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No more typing function! Less is more, right? ๐Ÿคฉ

  1. Callbacks ๐Ÿ“ž

Callbacks are like passing notes between functions. One function calls another when itโ€™s ready!

Theyโ€™re super helpful for tasks that take time, like fetching data from a server.


function processUserInput(callback) {

 const name = prompt('Enter your name');

 callback(name);

}

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Just drop the callback like itโ€™s hot ๐Ÿ”ฅ!

  1. Closures ๐Ÿ”’

Closures are like function vaultsโ€”securely storing variables even after the function is done. Need access to an old variable? Closures have your back ๐Ÿ’ผ!


function outer(outerVar) {

 return function inner(innerVar) {

  console.log(outerVar, innerVar);

 };

}

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Unlock the power of closures in your code ๐Ÿ”“!

Pro Tip: Mastering these will take your JavaScript skills to the next level! ๐Ÿ† Keep coding, keep learning! ๐Ÿ’ป๐Ÿ’ก

JavaScript #CodeSmart #WebDevelopment #ArrowFunctions #Callbacks #Closures

COdeWith #KOToka

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