react-hook-form VS jest

React Hook Form is one of the most popular libraries for building forms in React apps with over 39k stars on GitHub. The library has no external dependencies according to Bundle Phobia.

Link: https://react-hook-form.com/

The idea here is to first define an array of field names for each provider. We'll also need a map with more detailed information about each field. This map will contain the field name, label, type, and validation options. We'll use this map to render the form fields and also to validate the form. Finally, we'll have a Form component that will render the form fields based on their type and handle the form submission. We'll use React Hook Form to handle the form state and validation.

Now we need to install React Hook Form because that is the package we are going to use for building our form. We also need to install the package for SendGrid. cd into the sendgrid-contact-form folder and then run this command to install the packages:

Imagine someone unknowingly unleashing heavy computation on a component without useMemo. That computation will run on every component re-render. Not only that, The dependency array in your hooks (useEffect, useMemo, useCallback) are also checked in each re-render. It's like a double whammy for performance pitfalls! I know that you can avoid this by some technique like what react-hook-form done, but remember thats an extra complexity.

But now, all those difficulties are gone since I found React Hook Form and zod.

This will greatly simplify the handling of AJAX forms in React - like for instance for a search form. But again, this may not be enough to get rid of third-party libraries like React Hook Form, which does much more than just handle form submission (validation, side effects, etc).

We could consider to do all these steps specifically for each data-set; of course this isn't an efficient approach due to the amount of repeated code involved. So what if we could abstract all this in a single management? A way to do this could be using a simple configuration in which we specify each aspect for each input (its type, validations required and so on). And we can do this thanks to the extreme flexibility provided by React Hook Form.

There are several testing approaches you can take to ascertain the functionality of the auth API. One way would be to automate the testing using unit tests with tools like Jest and Supertest. Alternatively, you can make use of API clients like Postman or the Thunder Client VS Code extension to test the API.

GitHub | Website

Jest

you have selected a testing framework. In my case, it's Jest with Supertest

Jest, created and maintained by Facebook, is a JavaScript testing framework with a focus on simplicity. It is often recognized for its zero-configuration setup and seamless integration, especially with React applications, making it a favored choice for developers in both small-scale projects and large enterprise applications.

Jest (https://jestjs.io/)

console.error Jest encountered an unexpected token Jest failed to parse a file. This happens e.g. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax. Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration. By default "node\_modules" folder is ignored by transformers. Here's what you can do: • If you are trying to use ECMAScript Modules, see https://jestjs.io/docs/ecmascript-modules for how to enable it. • If you are trying to use TypeScript, see https://jestjs.io/docs/getting-started#using-typescript • To have some of your "node\_modules" files transformed, you can specify a custom "transformIgnorePatterns" in your config. • If you need a custom transformation specify a "transform" option in your config. • If you simply want to mock your non-JS modules (e.g. binary assets) you can stub them out with the "moduleNameMapper" config option. You'll find more details and examples of these config options in the docs: https://jestjs.io/docs/configuration For information about custom transformations, see: https://jestjs.io/docs/code-transformation

Note: I will be using Jest as testing framework throughout the examples.

We use Jest Framework for testing. Jest is not a dogma, and, of course, in its place can be any other test runner, such as Mocha or Ava. Let's focus on tests. I'll provide a short example because I don’t want to waste your time. You can find the full version here. It's crucial to read the comments in the code below. Let's go!

Jest has long been my favorite got to test runner when it comes to UI unit and integration testing. With tools like React Testing Library (Testing Library framework for React) you get the benefit of very easy to write and maintain tests, as well as a quick and efficient way to run our tests.