类选择器和ID选择器有什么区别，为标签设置id="ID名称"，而不是class="类名称"有什么区别？

Question

为标签设置id="ID名称"，而不是class="类名称"不都一样吗？不就是换了一个样式而已？

Answer 1

What is the difference between a class selector and an ID selector? What is the difference between setting id="ID name" for a tag instead of class="class name"? -PHP Chinese Questions and Answers - What is the difference between a class selector and an ID selector? What is the difference between setting id="ID name" for a tag instead of class="class name"? -PHP Chinese website Q&A

Please watch and learn.

Answer 2

当然有区别了，对于dom而言，id是唯一的，class是可以多个的