Displaying an image that spans the entire width of the browser

I'm currently working on a WordPress site and have encountered an issue with the header image. I want it to span the full width of any browser window.

The existing code in the parent theme is as follows:

background: url("/test/wp-content/themes/Howtopassyourexams.com/Theme/images/page-header-bg.jpg");
background-repeat: no-repeat;
background-position: center center;
-webkit-background-size: cover;
background-size: cover;
position: relative;
box-shadow: 0 7px 10px -10px #000;
width: 100%;
z-index: 0;
height: 300px;
margin-bottom: 80px;

In addition, there is a second stylesheet in the theme that inherits most styles from the parent stylesheet. The CSS for the image in that stylesheet is:

background: url("/test/wp-content/themes/Howtopassyourexams.com/Theme/images/page-header-bg.jpg");
width: 100%;
height: 300px;

Although I am not sure why there are two sets of CSS codes for the heading image in different stylesheets, this is how the theme was designed. My problem is that even when setting the width to 100%, the image maintains its original size (1369x325px) and gets cut off on smaller browsers.

If anyone can provide insight on what I might be doing wrong, please visit our website at

Thank you.

htmlcsswordpress

Answer №1

The first rule in the stylesheet specifies the size of the background image using the keyword cover.

However, the second rule's width: 100%; only affects the width of the surrounding element and not the background image itself, which remains at cover.

To adjust this, you need to include:

background-size: 100%;

in the second rule.

Answer №2

To achieve this effect, you have two options. The first one involves placing the image within a relative div and then applying the following CSS:

img {
  position: absolute;
  width: 100%;
}

Alternatively, you can simply use the vw unit like so:

img {
  width: 100vh;
}

If you are working with a background image, you can utilize background-size: 100%;

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