Specify Image Dimensions is a plugin that scans and inserts missing width and height in all <img> tags. Specifying the dimension allows for faster rendering by eliminating the need for unnecessary re-flows and repaints. This is particularly helpful with website speed tools such as GTmetrix and Google's PageSpeed.
Home Page: https://wordpress.org/plugins/specify-image-dimensions/
Also mentioned in the support thread here, SVG and webP images are given a value of "0" in the width and height when they are not assigned.
Possible fixes:
jpeg, jpg, png, gif)width=100% and height=autoPerhaps an option can be added for the second point to allow users decide if they still want to add dimensions to SVG/webP.
Reference: Blank height and width attributes
When there are images that have blank dimensions (for both width and height), the plugin doesn't detect it:
<img src="https://placehold.it/100x50" width="" height="">
However, when there is only one blank dimension, my plugin does catch it. The following two examples will work:
<img src="https://placehold.it/100x50" width="">
<img src="https://placehold.it/100x50" height="">
WordPress user (Sandra) found a bug that make some attributes disappear. So this code turns out like this:
<img id="rating_1952_1" src="https://www.foodcat.de/wp-content/plugins/wp-postratings/images/stars_flat(png)/rating_off.png" alt="1 Stern" title="1 Stern" onmouseover="current_rating(1952, 1, '1 Stern');" onmouseout="ratings_off(0, 0, 0);" onclick="rate_post();" onkeypress="rate_post();" style="cursor: pointer; border: 0px;">
<img src="https://www.foodcat.de/wp-content/plugins/wp-postratings/images/stars_flat(png)/rating_off.png" alt="1 Stern" id="rating_1952_1" width="17" height="16">
Here is the fix she provided:
# Match all image attributes
$attributes = 'src|srcset|longdesc|alt|class|id|usemap|align|border|hspace|vspace|crossorigin|ismap|sizes|title|onmouseover|onmouseout|onclick|onkeypress|style|width|height';
…
# Recreate the image tag with dimensions set
$tag = sprintf( '<img src=%s%s%s%s%s%s%s%s%s%s%s
Please apply the fix and test locally. Once it works out, then push to production and apply bug fix credit.
Reference: https://wordpress.org/support/topic/removes-javascript-events-on-img-tags/
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