如题
在css 里修改img为display:none的话
<style>
* {
margin: 0;
padding: 0;
position: relative;
}
img {
visibility: hidden;
/* display: none; */
}
</style>
我们获取它的offsetTop的值为0：
var aImgs = document.images;
alert(aImgs[2].offsetHeight);
应该使用visibility: hidden;代替disply:none.
一个需求用到的笔记。
END
code:
<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>img Test</title>
<style>
* {
margin: 0;
padding: 0;
position: relative;
}
img {
visibility: hidden;
/* display: none; */
}
</style>
</head>
<body>
<div id="box">
<img id="one_img" src="../images/0.jpg" alt="null">
<img src="../images/1.jpg" alt="null">
<img src="../images/2.jpg" alt="null">
</div>
<script>
var aImgs = document.images;
var one_img = document.getElementById("one_img");
//one_img.style.display="none";
// for(var i=0;i<aImgs.length;i++){
// aImgs[i].style.display="block";
// }
alert(aImgs[2].offsetHeight);
</script>
</body>
</html>