CSS Transitions allow you to change property values smoothly (over a given duration) instead of instantly. This module will cover the basics of CSS transitions, how to implement them, and practical examples to help you understand their usage.

1. Transition Properties: The properties that can be transitioned.
2. Transition Timing Functions: How the intermediate values of the transition are calculated.
3. Transition Duration: The time it takes for the transition to complete.
4. Transition Delay: The time to wait before starting the transition.

The transition property is a shorthand for four transition-related properties:

• property: The CSS property you want to animate.
• duration: The duration of the transition (e.g., 2s for 2 seconds).
• timing-function: The speed curve of the transition (e.g., ease, linear).
• delay: The delay before the transition starts (e.g., 1s for 1 second).

In this example, when you hover over the .box element, its width, height, and background color will transition over 2 seconds.

The timing function defines how the intermediate values of the transition are calculated. Common timing functions include:

• ease: Starts slow, then fast, then ends slow (default).
• linear: Constant speed from start to end.
• ease-in: Starts slow.
• ease-out: Ends slow.
• ease-in-out: Starts and ends slow.

In this example, the width of the .box element will transition with an ease-in-out timing function.

The duration specifies how long the transition should take, and the delay specifies how long to wait before starting the transition.

In this example, the width transition starts immediately and takes 2 seconds, while the height transition starts after a 1-second delay and also takes 2 seconds.

Let's create a button that changes its background color and size when hovered over.

In this example, when you hover over the button, its background color changes from blue to green, and it scales up by 10%, both over 0.5 seconds with an ease timing function.

Create a div element that changes its background color and rotates when hovered over.

• The transition-div class sets the initial styles for the div, including the transition properties.
• On hover, the background color changes to a different color, and the div rotates by 45 degrees over 1 second.

• Forgetting to specify the transition property: Ensure you specify which property you want to animate.
• Using incompatible properties: Not all CSS properties can be transitioned. Check the documentation to see if a property supports transitions.
• Overusing transitions: Too many transitions can make your website feel sluggish. Use them sparingly for the best user experience.

CSS Transitions are a powerful tool to enhance user experience by providing smooth animations. By understanding the key properties and how to use them, you can create engaging and interactive web elements. Practice with different properties and timing functions to see how they affect the transitions. In the next topic, we will dive into CSS Animations, which offer even more control over animations.