When an image is not provided in my CMS database, it currently produces an img src="(unknown)". I am looking for a way to use JavaScript to change this to img src="/images/missing.png". As someone who is new to JS, I have attempted various hacks but none have been successful. Any suggestions? (There may be multiple images on the page, if that matters)
If you encounter a missing image src, you can make it work by utilizing the onError event for handling it.
<img src="main_img.png" onError="this.onerror=null;this.src='/images/missing.png';" />
This code snippet helped me tackle a comparable issue I faced (using JavaScript)...
const pics = document.querySelectorAll("img");
pics.forEach((pic) => {
let picSrc = pic.getAttribute("src");
if (picSrc === "") {
pic.src = "/images/not-found.png";
}
});
When working with PHP, you may encounter this issue, but don't worry, simply utilize the esc_url($url) function.
The esc_url function effectively resolves the problem.
When the page is loading, if you are dynamically adding the src attribute, it's a good idea to have a check in place to switch it with a placeholder if necessary.
if (imgSrc === "unknown") {
imgSrc = "placeholder.png";
}
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