Solutions to Fix Error “Expected to return a value at the end of arrow function consistent-return”

When you are working with JavaScript, you can design web pages in a new and unique way to keep the user intact with interactive designs. That’s how JavaScript works. You may also encounter many errors when designing a project. Among many errors, you can also encounter the error “Expected to return a value at the end of arrow function consistent-return”.

The error is about the functions, and it is not easy to call the function when working on a JavaScript program. In this article, we are going to help you understand the error and how to resolve it. But before that, we need to know how the error shows up

How error pops up?

The error warning shows when you have an error with the arrow function. You get:

Expected to return a value at the end of arrow function consistent-return

The program that results in the error is:

// Disable default form submission when user hits enter. 
const $facetInput = $('.facet-input'); 
const $submitButton = $('.facet-submit'); 
$facetInput.on('keydown', (event) => { 
   if ((event.key === 'enter' || event.keyCode === 13) && event.target !== $submitButton) {       event.preventDefault(); 
      return false; 
   } 

The code returns the error. Now that you are aware of the code error, let’s dig deeper to learn how to solve it

How to solve the error “Expected to return a value at the end of arrow function consistent-return”

Arrow function provides you with a way to call a function to write anonymous expressions in JavaScript. It shows you a way to write the function with simple syntax, which is represented by ‘character =>’.

Make a value in all branches of code

Using the Eslint can make the tool automatically detect and verify all paths in a function that can either don’t return a value or give the value back. This is done with the assistance of the consistent-return rule. This rule will also guide you if you miss giving a value back in any function’s branch.  Check out how you can handle the error you get when working on your project by changing the command so that you can get the code of a value in all branches

$facetInput.on('keydown', (event) => { 
  if ((event.key === 'enter' || event.keyCode === 13) && event.target !== $submitButton) { 
     event.preventDefault(); 
     return false; 
  } 
return <something else>; // false, true, 'whatever' - up to you
});

This approach is used with the ‘if’ condition. In the case, the ‘if’ condition you have used has not been evaluated to true then there must be an implicit ‘return undefined’ when using eslint.

This can solve the issue you have been facing when coding a JavaScript project.

Conclusion

Here you have all the information, in the end, to help yourself get rid of the error “Expected to return a value at the end of arrow function consistent-return”.

I hope you find it helpful!

Your comments are always encouraged, so feel free to drop a message below!

Reference Source: https://www.anycodings.com/1questions/196534/expected-to-return-a-value-at-the-end-of-arrow-function-consistent-return

https://stackupperflow.com/why-eslint-throw-that-error-and-how-can-i-get-rid-of-it/