Tutorials

In this lesson we'll create a dropdown menu that is toggle via a button setting state. We'll then setup a ref to get access to the container div. Finally using event listeners on the document body we will check if the user clicked anywhere outside of our dropdown and then close the dropdown.

In this lesson we'll explore how to get Emotion setup with create-react-app. Then dive into using @emotion/styled to create styled React components. Finally we'll show how to structure styled components to allow you to use :hover and transition to create animated hover effects.

In this lesson we'll dive into using some clever offset techniques to make a button that appears to be 3D. We'll add in some animations to control those offsets so that when our button is pressed/released the button animates in and out while playing an airhorn sound.

In this lesson we'll dive into using some clever offset techniques to make a button that appears to be 3D. We'll add in some animations to control those offsets so that when our button is pressed/released the button animates in and out while playing an airhorn sound.

In this lesson we'll explore how to combine useEffect with useState to create a reusable hook. It will add a window listener for mousemove and update state with each movement.

In this lesson we'll explore how to create useEffect call, and listen to the window for mouse movement. We'll learn about cleaning up our effects, and how to pass an empty array into the second argument of our effect to create a componentDidMount like effect. Finally we'll trigger a mount/unmount to show effects getting cleaned up correctly.

In this lesson we'll show the traditional method of updating state with a spread operator and then transform it into using the Immer produce functionality. This will allow us to achieve immutability on our data with simple mutations. We'll then show how Immer can use currying to create updater functions that can be passed directly to setState.

In this lesson we'll explore how to test that an async form submission successfully happened using Jest. We'll also take advantage of react-testing-library to render our react components to a fake dom. We'll use MemoryRouter to mock what a browser would normally do in the event of a transition, and create a fake component route to confirm that the submission successfully redirected us to the url we wanted.

In this lesson we'll explore setting up a stack navigator in React Navigation. We'll create a custom component that uses withNavigation to allow us to listen to navigation transitions. Using the BackHandler from React Native we can ask the screen if custom needs are required when the hardware back button is pressed. Finally we'll prompt the user if they want to navigate.

In this lesson we'll explore how to setup a draggable circle. Then we'll dive into using the call method to create JavaScript callbacks whenever certain conditions are met inside of Reanimated.