link <link rel="stylesheet" href="">
link:css <link rel="stylesheet" href="style.css">
缩写：form
<form action=""></form>
缩写：form:get
<form action="" method="get"></form>
缩写：form:post
<form action="" method="post"></form>
快速写console.log()
console.log(img);
img.log再tab键。