Learn localStorage by Building a Todo App - Step 11

JavaScript
1

Tell us what’s happening:

Hey!

I have a question about arrow function.

const dataArrIndex = taskData.findIndex((item) => item.id === currentTask.id)

Is it good practice if the condition (after =>) is wrapped by {} ?
I understand that you can omit braces in specific scenarios but I’m curious what is the best practice :slight_smile:

Your code so far

<!-- file: index.html -->


/* file: script.js */
// User Editable Region



// User Editable Region

/* file: styles.css */

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36

Challenge Information:

Learn localStorage by Building a Todo App - Step 11

2

Arrow functions can have implicit return statements (i.e. the return keyword is not required), for a single-line function body. In this case, the curly braces are also not required:

EXAMPLE:

const addTwoNumbers = (a, b) => a + b

If you have a multi-line function body, you must also use curly braces and explicitly return:

EXAMPLE:

const addTwoNumbers = (a, b) => {
  let result = a + b;
  return result;
}

These examples are only illustrative, as the second example is just an unnecessarily verbose version of the first, but hopefully you get the point!

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