CSS樣式中有浮動的狀況下,通常都不但願正常的文檔流顯示的內容被蓋住,因此有浮動的狀況下,會緊跟着後面加一個div清除浮動。css
.clear{ width: 0px; height: 0px; clear:both; }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>清除浮動</title> <style type="text/css"> .div1{ width: 200px; height: 200px; background-color: green; float: left; } .div2{ width: 200px; height: 200px; background-color: red; float: left; } .div3{ width: 500px; height: 500px; background-color: gray; } .clear{ width: 0px; height: 0px; clear:both; } </style> </head> <body> <div class="div1"></div> <div class="div2"></div> <div class="clear"></div> <div class="div3"></div> </body> </html>