Science Knowings: CSS Course For Social Media

CSS Transitions

CSS Transitions

Welcome! In this session, we'll dive into CSS Transitions. CSS transitions allow you to animate changes in CSS properties over time, creating smooth and user-engaging experiences.

What are CSS Transitions?

CSS transitions are effects that smoothly transition an element from one style state to another. They allow you to apply animations to various CSS properties, such as position, color, and opacity.

Why use CSS Transitions?

  • Enhanced user experience: Smooth transitions create a better and more interactive interface.
  • Improved accessibility: Animations can help users understand the flow of the page and its elements.
  • Visual effects: Add visual interest and dynamism to your web designs.

Transition Properties

CSS transitions can be applied to various properties. The most common ones include:

  • transform
  • opacity
  • background-color
  • width
  • height

The transition Property

The transition property is a shorthand property that sets transition effects for all applicable properties at once.

transition: property duration timing-function delay;


The transition-delay property specifies the delay before the transition starts after the trigger event.

transition-delay: 0s;


The transition-duration property sets the length of time the transition takes to complete.

transition-duration: 1s;


The transition-timing-function property controls the speed and shape of the transition.

transition-timing-function: ease-in-out;

Example Syntax and Output

Here's an example of a CSS transition:

button {
transition: background-color 0.5s ease;

When you hover over the button, the background color transitions from its initial value to a new color over 0.5 seconds.

Practical Example with CSS3 Animations

<button type="button" class="button-primary">
<span>Click me</span>
/* CSS */
.button-primary {
transition: transform 0.2s ease-in-out;
.button-primary:hover {
transform: scale(1.1);

Browser Compatibility for CSS Transitions

CSS transitions are supported by all modern browsers. Here's a table of browser compatibility:

Internet ExplorerNo

Best Practices for Using CSS Transitions

  • Use transitions sparingly and only when they enhance the user experience.
  • Optimize transition durations for performance.
  • Test transitions across different devices and browsers.
  • Consider using CSS animations for more complex effects.

Common Issues and Troubleshooting

  • Transitions not working: Check the CSS syntax, property names, and browser compatibility.
  • Transitions too slow or fast: Adjust the transition-duration property.
  • Transitions not smooth: Adjust the transition-timing-function property.

Next Topic: CSS Animations

In the next session, we'll explore CSS animations, which provide even more powerful control over animations. Follow us to learn more about creating engaging and interactive web experiences with CSS.