Expand the width of the image to fill the entire screen

I have been working on trying to insert an image into my header element. However, when I test it using Live Server, the image doesn't fully fill the width of the container.

Update: The dimensions of the image are 899.875 x 600.

Below is my CSS and HTML code snippets:

* {
    margin: 0;
    padding: 0;
}
body {
    width: 100%;
    height: 100%;
    color: white;
    min-width: 100%;
    min-height: 100%;
    height: auto;
    top: 0;
    left: 0;
    position: absolute;
}

header {
    min-height: 100%;
    min-width: 1024px;
    width: auto;
    height: 600px;
}

img {
    max-width: 100%;
    max-height: 100%;
}
<body>
    <header>
        <img id='backgroundImg' src="image.jpg" alt="">
    </header>
</body>

htmlcssimagecontainers

Answer №1

I would strongly advise against using position absolute for your body element. Instead, consider using the unit 100vh. However, it's important to clarify how you want the image to behave within the header based on your question. Does this align with your desired outcome?

* {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
}

header {
  width: 100%;
  height: 600px;
  background-color: aqua;
  padding: 1rem;
}

img {
  display: block;
  object-fit: cover;
  width: 100%;
  height: 100%;
}
<body>
  <header>
    <img id='backgroundImg' src="https://source.unsplash.com/random" alt="image">
  </header>
</body>

Answer №2

* {
    margin: 0;
    padding: 0;
}
body {
   
    color: white;    
    height: calc(100vh - 4px);  
    border:solid 2px red;
    z-index:5;
}

header {    
    
    height:30vh;
    background: url('https://via.placeholder.com/100');
    background-repeat: no-repeat;
    background-size: cover;
}
<body>
    <header>
        
    </header>
</body>

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