How to select image src via Javascript

Question

I have HTML like this:

<div class="h5p-image">
  <img src="localhost/images/file-5fa55a3d758c4.jpg" alt="New image" title="" style="width: 100%; height: 100%;">
</div>

and I want to select that image via src, so my JS looks like this:

var list= document.querySelectorAll('.h5p-image > img').src = "file-5fa55a3d758c4.jpg";
var i;
for (i = 0; i < list.length; i++) {
  list[i].style.width = "300px";
}

Error from the console:

Uncaught TypeError: Cannot read property 'length'

Can anybody try to help me with this?

mplungjan · Accepted Answer · 2020-11-09 09:55:38Z

1

Your list is either

var list= document.querySelectorAll('.h5p-image > img')

OR

var list= document.querySelectorAll('.h5p-image > img[src$="5fa55a3d758c4.jpg"]') (using ends-with)

assuming you have more than one div with that image.

So the code is likely this to style the div

[...document.querySelectorAll('.h5p-image > img[src$="5fa55a3d758c4.jpg"]')]
.forEach(img => img.closest("div").style.width = "300px");

or this to just style the image

[...document.querySelectorAll('.h5p-image > img[src$="5fa55a3d758c4.jpg"]')]
.forEach(img => img.style.width = "300px");

Or if there is only ONE image

document.querySelector('.h5p-image > img').style.width = "300px"

[...document.querySelectorAll('.h5p-image > img[src$="758c4.jpg"]')]
.forEach(img => img.style.width = "300px");

<div class="h5p-image">
  <img src="https://www.nice-premium.com/local/cache-vignettes/L600xH800/2012-03-19_08.53.13-758c4.jpg" alt="New image" title="" style="width: 100%; height: 100%;">
</div>


<div class="h5p-image">
  <img src="https://www.nice-premium.com/local/cache-vignettes/L600xH800/2012-03-19_08.53.30-f371c.jpg" alt="New image" title="" style="width: 100%; height: 100%;">
</div>


<div class="h5p-image">
  <img src="https://www.nice-premium.com/local/cache-vignettes/L600xH800/2012-03-19_08.53.13-758c4.jpg" alt="New image" title="" style="width: 100%; height: 100%;">
</div>

edited Nov 9, 2020 at 9:55

answered Nov 9, 2020 at 9:42

mplungjan

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2 Comments

jomskris Over a year ago

Thank you, I got this error from the console " Failed to execute 'querySelectorAll' on 'Document': '.h5p-image > img[src*=file-5fa55a3d758c4.jpg]' is not a valid selector."

jomskris Over a year ago

Still, " Failed to execute 'querySelectorAll' on 'Document': '.h5p-image > img[src$=5fa55a3d758c4.jpg]' is not a valid selector."

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