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CSS3 has fully absorbed the needs of web development for many years and absorbed many novel features. For example border-radius
The most exciting feature of CSS3 is the enhancement of selectors. For example, attribute selectors can select tags based on a certain attribute value, and position selectors can select tags based on the position of child elements.
Many browsers currently in use, such as IE7, mainly support CSS2. Most attribute selectors are not ideal.
It is precisely because of the browser’s compatibility issue with CSS3. No browser has better standard support for it.
jQuery provides almost all selectors under the CSS3 standard through pre-programmed JavaScript. Developers can use these selectors to easily select various elements. For use by javascript programming.