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问题:

I am admittedly a beginner, but I also did a fair amount of searching before posting this. There seems to be extra space around my div element. I also would like to point out that I tried many combinations of border: 0, padding:0, etc. and nothing seemed to get rid of the white space.

Here is the code:

<html>
<head>
    <style type="text/css">
        #header_div  {
            background: #0A62AA;
            height: 64px;
            min-width: 500px;
        } 
        #vipcentral_logo { float:left;  margin: 0 0 0 0; }
        #intel_logo      { float:right; margin: 0 0 0 0; }
    </style>
</head>
<body>
    <div id="header_div">
        <img src="header_logo.png" id="vipcentral_logo">
        <img src="intel_logo.png" id="intel_logo"/>
    </div>
</body>

This is what it looks like (I inserted red arrows to explicitly call out the extra space):

I was expecting the blue color to abut directly to the browser edges and toolbar. The images are both exactly 64 pixels tall and have the same background color as the one assigned to #header_div. Any information would be greatly appreciated.

回答1:

body has default margins: http://www.w3.org/TR/CSS2/sample.html

body { margin:0; } /* Remove body margins */

Or you could use this useful Global reset

* { margin:0; padding:0; box-sizing:border-box; }

If you want something less * global than:

html, body, body div, span, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, abbr, address, cite, code, del, dfn, em, img, ins, kbd, q, samp, small, strong, sub, sup, var, b, i, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, figure, footer, header, hgroup, menu, nav, section, time, mark, audio, video {
    margin: 0;
    padding: 0;
    border: 0;
    outline: 0;
    font-size: 100%;
    vertical-align: baseline;
    background: transparent;
}

some other CSS Reset:

http://yui.yahooapis.com/3.5.0/build/cssreset/cssreset-min.css
http://meyerweb.com/eric/tools/css/reset/
https://github.com/necolas/normalize.css/
http://html5doctor.com/html-5-reset-stylesheet/
…

回答2:

try removing the padding/margins from the body tag.

body{
padding:0px;
margin:0px;
}

回答3:

That's the default margin/padding of the body element.

Some browsers have a default margin, some a default padding, and both are applied as a padding in the body element.

Add this to your CSS:

body { margin: 0; padding: 0; }

回答4:

try to ad the following in your CSS:

body, html{
    padding:0;
    margin:0;
}

回答5:

I found this problem continued even when setting the BODY MARGIN to zero.

However it turns out there is an easy fix. All you need to do is give your HEADER tag a 1px border, aswell as setting the BODY MARGIN to zero, as shown below.

body { margin:0px; }

header { border:1px black solid; }

If you have any H1, H2, tags within your HEADER you will also need to set the MARGIN for these tags to zero, this will get rid of any extra space which may show up.

Not sure why this works, but I use Chrome browser. Obviously you can also change the colour of the border to match your header colour.

回答6:

Go with this

body {
    padding:0px;
    margin:0px;
}

回答7:

I had the same problem and my first <p> element which was at the top of the page and also had a browser webkit default margin. This was pushing my entire div down which had the same effect you were talking about so watch out for any text-based elements that are at the very top of the page.

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>My Website</title>
  </head>
  <body style="margin:0;">
      <div id="image" style="background: url(pixabay-cleaning-kids-720.jpg) 
no-repeat; width: 100%; background-size: 100%;height:100vh">
<p>Text in Paragraph</p>
      </div>
    </div>
  </body>
</html>

So just remember to check all child elements not only the html and body tags.