[CSS căn bản] - bài 03 - 3
RUN
<!DOCTYPE html> <html> <head> <title>Demo freetuts.net</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <style> #active{ background: red } </style> </head> <body> <div id="active"> ACTIVE </div> <div> NON-ACTIVE </div> </body> </html>
PHÓNG TO