The picture does not occupy the entire page

Here is a simplified version of my HTML and CSS:

@keyframes animatedBackground {
  from {
    background-position: 0 0;
  }
  to {
    background-position: 100% 0;
  }
}
 
 *{margin:0;padding:0;}/*added as requested*/
.background-image {
  background-image: url("http://wallpapercave.com/wp/UoQbFHi.jpg");
  background-position: 0px 0px;
  left: 0;
  bottom:0; /*added as requested*/
  right:0;
  top:0; /*added as requested*/
  position: fixed;
  z-index: 1;
  animation: animatedBackground 10s linear infinite;
  background-size: cover;
  height: 160%;
  -webkit-filter: blur(5px);
  filter: blur(5px);
}
<div class="background-image"></div>

Apparently 

-webkit-filter: blur(5px);
  filter: blur(5px);

Is not working correctly in this context. In addition, I am experiencing an unusual spacing issue at the top when viewing it in my browser.

EDIT: The space at the top persists despite efforts to correct it. View the result https://i.sstatic.net/XMiKT.png

htmlcss

Answer №1

Here are some suggestions to try:

Update the body style with margin: 0; padding: 0;

Ensure that the .background-image class has CSS properties set to 

top: 0; left: 0; right: 0; bottom: 0;

Replace instances of webkit-filter with -webkit-filter

body {
  margin: 0;
  padding: 0;
}
@keyframes animatedBackground {
  from {
    background-position: 0 0;
  }
  to {
    background-position: 100% 0;
  }
}
.background-image {
  background-image: url("http://wallpapercave.com/wp/UoQbFHi.jpg");
  background-position: 0px 0px;
  left: 0;
  bottom: 0;
  right: 0;
  top: 0;
  position: fixed;
  z-index: 1;
  animation: animatedBackground 10s linear infinite;
  background-size: cover;
  height: 160%;
  -webkit-filter: blur(5px);
  filter: blur(5px);
}
<body>
  <div class="background-image"></div>
</body>

Answer №2

Most web browsers come with a predefined margin and padding in the user-agent-stylesheet.

While not all browsers allow you to modify this CSS file, it is simple to manually override these settings by adding custom CSS for the body element on your website:

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

Answer №3

To properly define the structure of your webpage, consider the division of Body into separate sections. Pay attention to the Margins within the Body element. When setting margin:0px for the body, it will reach all the way to the top edge of the browser window.

Include the following lines in your CSS stylesheet:

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

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