Despite using the 'img-fluid' class, the image is still not fully responsive

Despite using the img-fluid class in my img tag, I am facing an issue with image responsiveness. The image is responsive on smaller screens but loses its responsiveness after a certain screen size.

I have researched solutions on How to make an image responsive using bootstrap without having it take up the entire width of the division? and Bootstrap: img-responsive vs img-fluid, but none have resolved the problem.

This is how I attempted to address the issue:

HTML:

    <!-- THE HEADER -->
    <div class="container-fluid header">
        AUST CSE
    </div>
    <!-- IMAGE JUST BELOW HEADER -->
    <div class="wrapper" style="background: blue">
        <img src="images2/banner.jpg" class="img-fluid">
    </div>

CSS:

    .wrapper {
        width: 100%;
    }

The page appears like this on smaller screens: https://i.sstatic.net/YUX2j.png However, on larger screens, the image fails to occupy 100% of the space and looks like this: https://i.sstatic.net/mh9Zy.png I aim for the image to cover 100% of the width and scale up its height, similar to its behavior on smaller screens.

htmlcssbootstrap-4

Answer №1

img-fluid utilizes max-width: 100%;. This means that once the containing element reaches the same size or larger than the image's width, it will cease resizing.

There are two options to consider:

1) Opt for an image with a resolution equal to or greater than the widest width of your container element. If your container element's width is not fixed (e.g. always 80% of viewport width), choose an image large enough to look good on most displays (consider common browser resolutions).

@import url( 'https://maxcdn.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css' );

/* Demonstrational styling, not essential. */
.demo {
  background-color: rebeccapurple;
}
<div class="container">
  <div class="row">
    <div class="col-md-4">
      <div class="demo">
        <img class="img-fluid" src="https://via.placeholder.com/1000x1000">
      </div>
    </div>
    <div class="col-md-8">
      <p>
        Lorem ipsum dolor. Lorem ipsum dolor. Lorem ipsum dolor. Lorem ipsum dolor. 
        Lorem ipsum dolor. Lorem ipsum dolor. Lorem ipsum dolor. Lorem ipsum dolor. 
        Lorem ipsum dolor. Lorem ipsum dolor. Lorem ipsum dolor. Lorem ipsum dolor. 
      </p>
  </div>
</div>

2) Override .img-fluid to allow the image to resize beyond its native resolution. The drawback is that the image may appear grainy. Smaller native resolutions will result in more noticeable distortion when scaled up. In my example, you can see that the text becomes quite fuzzy.

@import url( 'https://maxcdn.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css' );

/* Demonstrational styling, not essential. */
.demo {
  background-color: rebeccapurple;
}

/* Will override all instances of .img-fluid. */
.img-fluid {
  width: 100%;
}
<div class="container">
  <div class="row">
    <div class="col-md-4">
      <div class="demo">
        <img class="img-fluid" src="https://via.placeholder.com/100x100">
      </div>
    </div>
    <div class="col-md-8">
      <p>
        Lorem ipsum dolor. Lorem ipsum dolor. Lorem ipsum dolor. Lorem ipsum dolor. 
        Lorem ipsum dolor. Lorem ipsum dolor. Lorem ipsum dolor. Lorem ipsum dolor. 
        Lorem ipsum dolor. Lorem ipsum dolor. Lorem ipsum dolor. Lorem ipsum dolor. 
      </p>
    </div>
  </div>
</div>

I've included a scoping example below that enables you to selectively override certain images to exceed their native resolution. 

@import url( 'https://maxcdn.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css' );

/* Demonstrational styling, not essential. */
.demo {
  background-color: rebeccapurple;
}

/* Scoped for targeting specific images. */
.img-fluid.img-full-width {
  width: 100%;
}
<div class="container">
  <div class="row">
    <div class="col-md-4">
      <div class="demo">
        <img class="img-fluid img-full-width" src="https://via.placeholder.com/100x100">
      </div>
    </div>
    <div class="col-md-8">
      <div class="demo">
        <img class="img-fluid" src="https://via.placeholder.com/100x100">
      </div>
    </div>
  </div>
</div>

Answer №2

If you want your image to stretch across the entire width of the screen on larger devices, ensure that the image width matches the screen width.

It seems like your image dimensions are not large enough. The img-fluid class will resize the image, but only up to its maximum dimensions.

To resolve this issue, you have two options:

  1. (The recommended method) Choose an image with the correct width for the maximum screen size you desire (usually 1920px).

  2. You can add width: 100% to your image so that it spans the full width of the page. However, if your image's width is smaller than the screen size, the image may appear blurry. It's best to use images with the appropriate dimensions.

Example:

  • Example of an image with smaller dimensions (your current issue): JSFiddle

.container {
  border: 2px solid red;
}
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" rel="stylesheet"/>
<div class="container">
  <h2>Image</h2>
  <p>The .img-fluid class makes the image scale nicely to the parent element (resize the browser window to see the effect):</p>
  <img class="img-fluid" src="https://cdn-static.denofgeek.com/sites/denofgeek/files/styles/main_wide/public/2015/11/main_0.jpg?itok=k1tyTR75" alt="HL2"> 
</div>

  • Example of an image with larger dimensions (1920px): JSFiddle

.container {
  border: 2px solid red;
}
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" rel="stylesheet"/>
<div class="container">
  <h2>Image</h2>
  <p>The .img-fluid class makes the image scale nicely to the parent element (resize the browser window to see the effect):</p>
  <img class="img-fluid" src="https://s.aolcdn.com/hss/storage/midas/f8eff2a90708d58814bb4adc93634cbb/205752037/half-life-2-15622-1920x1080.jpg" alt="HL2"> 
</div>

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