css=pseudo-element-before
RUN
<!DOCTYPE html> <html> <head> <style> h1::before { content: url(https://freetuts.net/upload/tut_post/images/2019/01/20/1637/css-pseudo-element-img.GIF); } </style> </head> <body> <h1>Đây là phần tử h1</h1> </body> </html>
PHÓNG TO