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Learn how to avoid unwanted animations during the initial render of your React components with simple CSS transitions instead of animations.
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This video is based on the question https://stackoverflow.com/q/63649807/ asked by the user 'Jonatan Tibarovsky' ( https://stackoverflow.com/u/10275879/ ) and on the answer https://stackoverflow.com/a/63650017/ provided by the user 'Seyi Oluwadare' ( https://stackoverflow.com/u/11828450/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Preventing Animation on Initial Render: A Guide for React Developers

When building interactive web applications, particularly with React, developers often enhance user experience by incorporating animations. However, there are scenarios where triggering animations on the initial render can lead to unintended side effects—leading to confusion or a less polished appearance. One common issue arises when you have a menu component that’s set to display an exit animation as soon as the component loads, despite the fact that this isn’t necessary. In this guide, we will explore how to prevent unwanted animations upon initial render effectively.

The Challenge: Unwanted Exit Animation

In a typical React application, you might have a menu component with dynamic class names that updates based on its state. For example, in our scenario:

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Here, showMenu changes based on user interactions, and while you want to display animations when toggling the menu, you certainly do not want the exit animation to trigger on the initial load when the state is set to false. Thus, the exit animation unexpectedly plays as soon as the menu is rendered, leading to a frustrating experience for users.

The Solution: Transition Over Animation

To tackle this issue, we can modify our CSS from using animations to smooth transitions. This ensures that upon the component's initial render, the menu stays in its default closed state without triggering unnecessary animations. Here’s a step-by-step breakdown of how to achieve this:

Step 1: Add Transition to Menu

Start by introducing a transition effect to your menu container. This will allow for a smoother open and close action while subtly changing the menu’s position.

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Step 2: Update Animation Classes

Next, refine your CSS keyframes for entering and exiting animations, focusing instead on transformations that only take effect while toggling between open and closed.

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Step 3: The Outcome

By implementing transitions instead of animations, your menu will seamlessly stay closed without any exit animations triggering on the first render. The visual experience will be clean and intuitive, only displaying animations during actual interaction—when the user clicks to toggle the menu.

Final Considerations

While avoiding exit animations on initial render creates a better user experience, it's wise to incorporate 3D transforms where possible. This adjustment can enhance rendering performance, particularly on devices that cross the threshold of handling complex DOM changes effectively.

Recap: Keeping User Experience Smooth in React

In summary, managing animations when using React is crucial for maintaining an engaging user interface. By transitioning your styles from animations to effective transitions upon initial render, you can keep the experience conversant and user-friendly. Remember to adjust your styles thoughtfully to create an aesthetically pleasing visual effect that aligns with user interactions without confusion or disruption.

Now go ahead, implement these changes, and see how smoother your menu interactions can be!