clip:rect(top right bottom left);依據上-右-下-左的順序提供自圖片左上角爲(0,0)座標計算的四個偏移數值,其中任一數值均可用auto替換.css
矩形剪裁 還須要絕對定位position:absolute;這個clip有點像background-position這個屬性,常常用css雪碧圖都會知道。html
下面就把我測試的代碼方式:不能保證每張圖片大小都同樣,寫的一個小方法,讓裁切居中吧!jquery
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> </head> <style> *{margin: 0;padding: 0;} .a{ width: 2px;height: 300px; background: #000; position: absolute;z-index: 2 } .b{ position: absolute;z-index: 3; height: 2px;width: 600px; background: #000; } </style> <script src="jquery-1.11.1.min.js"></script> <body> <img id="i" src="01.jpg" alt="" width= "300 " height= "300 " style="position: absolute;top:0;left:0;"> <div class="a"></div> <div class="b"></div> <script> var h=$("#i").outerHeight(); var w=$("#i").outerWidth(); var box=100; $(".a").css("margin-left",w/2) $(".b").css("margin-top",h/2) var h1=(h/2)-box, w1=(w/2)+box, h2=(h/2)+box, w2=(w/2)-box; $("#i").css("clip","rect("+h1+"px,"+w1+"px,"+h2+"px,"+w2+"px)"); </script> </body>