Detailed explanation of CSS transition properties: transition-timing-function and transition-delay

In the process of developing web pages and applications, we often use some transition effects , achieve smooth animation effects by changing the style attributes of elements. CSS provides a set of transition properties, two of which are very important properties are transition-timing-function and transition-delay, which can help us control the time and speed of the transition.

1. transition-timing-function
   transition-timing-functionThe property is used to specify the time curve of the transition effect. By default, the transition effect is linear, that is, it changes at a constant speed. However, we can use this property to change the speed of the transition to make it more suitable for our needs.

transition-timing-functionThe attribute can accept the following values:

• ease: Default value. Start at a slow speed, then speed up, then end at a slow speed.
• ease-in: Start at a slow speed, then speed up.
• ease-out: Start fast, then slow down.
• ease-in-out: Start at a slow speed, then speed up, then slow down to a slow speed to end.
• linear: Uniform change, no acceleration or deceleration effect.
• cubic-bezier(n,n,n,n): You can customize the time curve, defined by the coordinates of four control points.

The following is a sample code showing the effect of different transition-timing-function values:

.box {
  width: 100px;
  height: 100px;
  background-color: red;
  transition: width 1s ease-out;
}

.box:hover {
  width: 300px;
}

In the above code, when the mouse is hovered When on the .box element, its width will smoothly transition from 100 pixels to 300 pixels, and the speed of the transition animation will be faster first and then slower.

2. transition-delay
   transition-delayThe attribute is used to specify the delay time for the start of the transition effect. By setting a delay time, we can control when the transition effect is triggered so that it starts at a specific point in time. This is useful for elements that create multiple transitions, triggering the transitions one after another.

transition-delayThe attribute can accept a time value indicating the length of the delay. Its unit can be seconds (s) or milliseconds (ms).

The following is a sample code showing the effect of the transition-delay attribute:

.box {
  width: 100px;
  height: 100px;
  background-color: red;
  transition: width 1s ease-in-out 0.5s;
  /* 延遲0.5秒后開始過渡 */
}

.box:hover {
  width: 300px;
}

In the above code, when the mouse hovers over .box When on an element, its width will smoothly transition from 100 pixels to 300 pixels, and the transition effect will start after 0.5 seconds.

By using the two transition attributes transition-timing-function and transition-delay, we can more precisely control the transition effect of the element and provide users with more Good interactive experience. Hopefully this article will help you better understand and apply these properties.

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