I put this image and I get those white edges around, I would like it to fit 100% of the screen, without those white edges.
<html>
<head>
<title>Prueba</title>
<style>
.imagen {
height: 100%;
width: 100%;
}
</style>
</head>
<body>
<img src="img_main.jpg" class="imagen" />
</body>
</html>
As they said, all browsers are not the same and have different measures as default. The best thing is to do a reset of the styles and start as if they were all the same, restarting the values of the most of the tag.
Reset.css : /* http://meyerweb.com/eric/tools/css/reset/
v2.0 | 20110126
License: none (public domain)
*/
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed,
figure, figcaption, footer, header, hgroup,
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
margin: 0;
padding: 0;
border: 0;
font-size: 100%;
font: inherit;
vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure,
footer, header, hgroup, menu, nav, section {
display: block;
}
body {
line-height: 1;
}
ol, ul {
list-style: none;
}
blockquote, q {
quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
content: '';
content: none;
}
table {
border-collapse: collapse;
border-spacing: 0;
}
Then you can add that reset.css file to your html file:
<html>
<head>
<title>Prueba</title>
<link rel="stylesheet" type="text/css" href="reset.css" />
<style>
.imagen
{
height: 100%;
width: 100%;
}
</style>
</head>
<body>
<img src="img_main.jpg" class="imagen"/>
</body>
</html>
Browsers have basic rules of margin and padding so you have to set them to 0 to remove the edges.
body, img{
margin:0;
padding:0;
}