I have successfully uploaded an image using JavaScript. Now, how can I modify it using CSS?

Apologies for the confusion earlier. I've realized that I missed sharing some crucial parts of my code, making my question unclear. The responses so far have been helpful, and upon examining the image data extracted from a query in my final project, I found a class that allowed me to make necessary edits based on the advice given below. Thank you!

In my current project, I am parsing data obtained from a query. Specifically, I am working with the SoundCloud Stratus API to create a basic SoundCloud web page.

$.each(data.slice(0,10), function(index, value) {
    var icon = value.artwork_url;
    if (icon == null) {
        icon = 'assets/blacksoundcloud.png'
    }
};

My question now pertains to CSS editing of the blacksoundcloud.png image. I am particularly interested in resizing the icon image. Is there a way to achieve this?

<header>
  <img id="main-logo" src="assets/soundcloud.png">
</header>

<section class="search">
  <input type="text" id="input" placeholder="Search for a song or artist">
  <button id="searchButton">Search</button>
</section>

<section>
  <div class="results-playlist"></div>
</section>

<script src="https://code.jquery.com/jquery-1.7.2.min.js"></script>
<script src="startercode_HW4_skeleton.js"></script>
<script src=“http://stratus.sc/stratus.js“></script>

The purpose of the blacksoundcloud.png image stored in my code is to replace missing images retrieved through queries into a database. Although not directly placed in my HTML file, I need guidance on how to resize it. Any suggestions would be appreciated once again.

To provide more context, here is the current state:https://i.sstatic.net/Bw8h1.png

Answer №1

From my understanding, your goal is to update the src attribute of the following code in case it does not contain an image.

<img id="main-logo" src="assets/soundcloud.png">

You can adjust the width and height using CSS. Specifically target only the <img> element with the src assets/blacksoundcloud.png like so:

img#main-logo[src="assets/blacksoundcloud.png"] {
  width:100px;
  height:100px;
}

The above code will ensure the image maintains a width and height of 100px, regardless of its original size. Take a look at the example below where the original image dimensions are around 336x224. See how it appears now.

img#main-logo[src="http://imaging.nikon.com/lineup/lens/zoom/normalzoom/af-s_dx_18-140mmf_35-56g_ed_vr/img/sample/img_01.jpg"] {
  width:100px;
  height:100px;
}
<img id="main-logo" src="http://imaging.nikon.com/lineup/lens/zoom/normalzoom/af-s_dx_18-140mmf_35-56g_ed_vr/img/sample/img_01.jpg">
<img id="main-logo" src="assets/testsoundcloud.png">

If you prefer displaying the image based on aspect ratio, consider using the max-width or max-height property as shown below:

#main-logo {
  max-width: 100px;
  max-height: 100px;
}

Take a look at the comparison below to see how the image is displayed with this approach and choose which option suits your needs best.

img#main-logo[src="http://imaging.nikon.com/lineup/lens/zoom/normalzoom/af-s_dx_18-140mmf_35-56g_ed_vr/img/sample/img_01.jpg"] {
  max-width:100px;
  max-height:100px;
}
<img id="main-logo" src="http://imaging.nikon.com/lineup/lens/zoom/normalzoom/af-s_dx_18-140mmf_35-56g_ed_vr/img/sample/img_01.jpg">
<img id="main-logo" src="assets/testsoundcloud.png">

Answer №2

It seems like your question was a bit challenging to grasp.

If resizing the oversized image is not an option (which would be preferable), you could consider one of these alternatives:

header img {
  width: 100px !important; /* adjust to required size */
  height: 100px; /* adjust to required size */
}

Alternatively, if completely removing the original image is necessary:

header img {
  display: none;
}
header:before {
  content: '';
  display: block;
  height: 100px; /* adjust to required size */
  width: 100px; /* adjust to required size */
  background: url(assets/soundcloud.png) 0 0 no-repeat;
  background-size: cover;
}

Answer №3

When it comes to manipulating images using CSS, one cannot directly alter the image itself. However, CSS can be utilized to modify how an image is presented on a webpage by adjusting its style properties like width and height.

img#main-logo {
  width: 239px;
  height: 114px;
  content: url("https://i.sstatic.net/Bw8h1.png");
}
<header>
  <img id="main-logo" src="doesNotExist.png">

</header>

<section class="search">
  <input type="text" id="input" placeholder="Search for a song or artist">
  <button id="searchButton">Search</button>
</section>

<section>
  <div class="results-playlist"></div>
</section>

Modifying the dimensions of an image with CSS is straightforward - by specifying values for width and height. In the past, if a valid src attribute was missing in the HTML markup, JavaScript would have been necessary to set the source property of the image. However, with CSS3, it is now possible to entirely change an image using only CSS, through the content property referencing the image URL.

Note: It is essential that elements with an id attribute in HTML are unique. If multiple images share the same class but require different styling based on their src attribute, CSS can still target them individually as demonstrated below:

img.m-logo[src="https://i.sstatic.net/Bw8h1.png"] {
  max-width: 100px;
  max-height: 100px;
  vertical-align:top;
}

img.m-logo[src="https://upload.wikimedia.org/wikipedia/commons/thumb/f/f4/Giant_leopard_moth_hypercompe_scribonia_3.jpg/339px-Giant_leopard_moth_hypercompe_scribonia_3.jpg"] {
  max-width: 150px;
  max-height: 200px;
  vertical-align:top;
}
<img class="m-logo" src="https://i.sstatic.net/Bw8h1.png">
<img class="m-logo" src="https://upload.wikimedia.org/wikipedia/commons/thumb/f/f4/Giant_leopard_moth_hypercompe_scribonia_3.jpg/339px-Giant_leopard_moth_hypercompe_scribonia_3.jpg">

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