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This article introduces the knowledge of "how to slowly change the element height of css". Many people will encounter such a dilemma in the operation of actual cases, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Methods: 1. Use the "element {animation: name time}" statement to animate the element and set the animation time; 2. Use the "@ keyframes name {100% {height: changed height value;}}" statement to set the animation action to change the height of the element, so as to achieve the effect of slowly changing the height of the element.

The operating environment of this tutorial: windows10 system, CSS3&&HTML5 version, Dell G3 computer.

How css slowly changes the height of elements

In css, you can use the animation attribute and the @ keyframes rule to achieve the animation of element scaling, and with the @ keyframes rule, you can create animation.

The principle of creating animation is to gradually change one set of CSS styles into another. You can change this CSS style many times during the animation process.

Specify the time when the change occurs as a percentage, or through the keywords "from" and "to", which is equivalent to 0 and 100%. 0% is the start time of the animation and the end time of 100% of the animation. For optimal browser support, you should always define 0% and 100% selectors.

Animate the action using the height property. This property is used to set the height of the element.

The syntax format of the animation attribute is as follows:

Animation: name duration timing-function delay iteration-count direction

Examples are as follows:

Document div {width:100px; height:100px; background-color:pink; animation:fadenum 5s;} @ keyframes fadenum {100% {height:300px;}}

Output result:

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