问题
I have simplified the code as much as possible, but still can't get it to center. I believe my inexperience with CSS is not allowing me to see something extremely simple.
If anyone also knows some good resources for css, that'll be great. I have read sections of many CSS books but there all very basic and cover the same thing.
CSS Markup:
/* MAIN ––––––––––––––––––––– */
html {
/* overflow-y:scroll; */
}
body {
/* margin:0; */
/* position:relative; */
}
/* Form ––––––––––––––––––––– */
#form {
margin:0 auto;
width: 300px;
height: 200px;
display: inline-block;
border: 2px solid black;
}
index.html
<html>
<body>
<form id='form'></form>
</body>
</hml>
回答1:
Change the display to block if you want to use margin:auto for centering. That does not work with inline elements.
来源：https://stackoverflow.com/questions/16802728/css-margin-auto-not-centering