Bobo
handsome
Excited
Doudou
Writing:
◆ #custom name{attribute:value}
Features:
◆ An ID selector can only be used once on a page. If it is used twice or more, it does not conform to the W3C specification, and there will be problems with JS calls.
◆ A tag can only be used With an ID selector
A label can call both the class selector and the ID selector