How can I dynamically create CSS animations with @-keyframes to control element rotation based on server-side values?

Dynamically Generating @-Keyframe CSS Animations

Creating CSS animations that modify style properties dynamically can be a challenging task. One common scenario is rotating an element and stopping it at a specific position, a value typically received from a server.

Traditional approaches using native JavaScript can be computationally intensive. However, using CSS animations offers a more efficient solution. To achieve this, we need to dynamically create a class that defines the animation's end point.

In the provided code, we dynamically insert a stylesheet rule into the head element. This technique allows us to override existing styles and avoid the need for additional libraries for specific tasks.

We create a style element and set its type to 'text/css'. Then, we define the keyFrames string containing the @-webkit-keyframes and @-moz-keyframes rules. To set the end rotation dynamically, we replace the placeholder A_DYNAMIC_VALUE in the string with the desired value, such as "180deg".

Finally, we append the style element to the head element, inserting the dynamically generated CSS rules into the document. This code allows us to control element rotation precisely without significantly impacting CPU usage.

The above is the detailed content of How can I dynamically create CSS animations with @-keyframes to control element rotation based on server-side values?. For more information, please follow other related articles on the PHP Chinese website!