86 lines
2.5 KiB
Markdown
86 lines
2.5 KiB
Markdown
---
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title: Using CSS Transitions
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---
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## Using CSS Transitions
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CSS Transitions are used to create smooth movement of the elements in a website. They require less code than CSS animations, and tend to be less complex.
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Transitions take an element from one CSS value to another. Here's an example:
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```css
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.transition-me {
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width: 150px;
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height: 50px;
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background: blue;
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}
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.transition-me:hover {
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width: 100px;
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height: 150px;
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background: red;
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}
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```
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Without a transition, this element will double in width as soon as the user hovers over it. But we might want a smoother movement. We can add a transition like so:
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```css
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.transition-me {
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width: 150px;
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height: 50px;
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background: blue;
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transition: 0 0.3s all ease;
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}
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```
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The `transition` CSS property is short-hand for several possible properties:
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```css
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transition: transition-delay transition-duration transition-property transition-timing-function
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```
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### `transition-delay`
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This is the time before the transition begins in seconds,
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```css
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div {
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transition-delay: 3s;
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}
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```
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### `transition-duration`
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The duration of the transition.
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```css
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div {
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transition-duration: 3s;
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}
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```
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### `transition-property`
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This describes the CSS property which is transitioning, the default value `all` will mean that all properties that change will be transitioned. For multiple transition properties, use a comma-separated list.
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```css
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div {
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transition-property: width, height;
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transition-property: all
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}
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```
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### `transition-timing-function`
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The timing function lets us control the speed of the transition. Several keywords can be used with generic timing functions, or you can specify a [cubic bezier](https://www.w3schools.com/cssref/func_cubic-bezier.asp).
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```css
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div {
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transition-timing-function: linear;
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transition-timing-function: cubic-bezier(0,0,1,1);
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}
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```
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For more options available in this property, check out the [W3Schools page on transition-timing-function](https://www.w3schools.com/cssref/css3_pr_transition-timing-function.asp). Also there's a handy [online cubic-bezier tool](http://cubic-bezier.com).
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## More about Using CSS Transitions
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* [W3 Schools CSS Transitions](https://www.w3schools.com/css/css3_transitions.asp)
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* [MDN CSS Transitions Web Docs](https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Transitions/Using_CSS_transitions)
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* [All you need to know about CSS Transitions by Alex MacCaw](https://blog.alexmaccaw.com/css-transitions)
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