最基本的:
设置 display 属性为 none，或者设置 visibility 属性为 hidden
技巧性:
设置宽高为 0，设置透明度为 0
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
/* 技巧型：宽高为0
img {
width: 0;
height: 0;
} */
/* img {
opacity: 0;
} */
</style>
</head>
<body>
<div style="display: none;">1111111</div>
<div style="visibility: hidden;">1111111</div>
<img src="http://www.sanye.cx/zb_users/theme/txcms2/include/logo.png" alt="">
</body>
</html>