The transition-timing-function feature in CSS plays a crucial role in defining how animations change over time. This feature allows you to control the pace of transitions between two states by using a specific mathematical function.
In simpler terms, if you want an element to smoothly transition from one initial state to another, using this feature can help manage how that transition occurs; for example, it can start slow and then speed up, or vice versa.
Various functions exist for this feature that each define a specific curve for fast changes. The ease function, which is commonly used, represents a standard curve that starts and ends gently, but accelerates in the middle.
Other functions like linear, ease-in, ease-out, and ease-in-out exist, each exhibiting a different behavior in speed changes. For instance, the linear function maintains a constant speed throughout the transition.
You can also use the cubic-bezier functions to create custom speed settings for your transitions. This function allows you to specify four parameters to define the transition's curve, and as a result, each behavior you imagine can effectively turn into reality.
Next, an example code and its explanation will be provided to get you more familiar with how to use this feature.
<!DOCTYPE html>
<html lang="fa">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Example of transition-timing-function</title>
<style>
div {
width: 100px;
height: 100px;
background-color: red;
transition: all 2s ease-in-out;
}
div:hover {
width: 200px;
background-color: blue;
}
</style>
</head>
<body>
<div></div>
</body>
</html>
Code Explanation:
The code <!DOCTYPE html>: Specifies the type of HTML document.
The code <html lang="fa">: Sets the language of the HTML document to Persian.
The code <meta charset="UTF-8">: Specifies the character encoding of the page.
The code <meta name="viewport" content="width=device-width, initial-scale=1.0">: Ensures proper scaling on various devices and sets the page dimensions.
The code <title>Example of transition-timing-function</title>: Sets the page title to "Example of transition-timing-function".
The code div: Defines a simple square that is red with dimensions 100 by 100 pixels.
The code transition: all 2s ease-in-out;: Specifies that all changes to this element occur over 2 seconds with an ease-in-out function.
The code div:hover: Defines changes during the hover state (removing the normal state and applying the changes). The size will double and the color will change to blue.