Setting a default image for the img setAttribute: A step-by-step guide

My code involves creating an img element using JavaScript:

var photo = document.createElement("img");

This element is populated with photos whose names are stored in an array of objects. The images are loaded like this:

photo.setAttribute('src', './pics/' + myarray[id].Name + '.jpg');

Everything works perfectly except for one thing - setting a default picture for elements without specified images.

I attempted to set a default image using setAttribute prior to the line above, hoping that it would only replace images for elements with specified pictures. However, when I checked the console.log, it still expected a 'name+.jpg' format, thus ignoring my previous line completely (which confirmed my suspicion).

So, what is the best way to assign a default picture to img elements within an array that do not have a specified image?

Thank you!

javascriptimagesetattribute

Answer №1

Are you familiar with using jQuery? Here's a helpful solution for the issue you described: if an image returns a 404 error, it will display a default image instead.

Check out this JSFiddle for more information

var photo = document.createElement("img");
photo.setAttribute("id", "myPhoto");
$('body').append(photo);

$("#myPhoto").attr("src", 'alogo3w.png').error(function() {
    $(this).attr("src", "https://www.google.com/images/srpr/logo3w.png");
})
​

Answer №2

Make sure to only apply the default option when needed

photo.setAttribute('src', './pics/' + ( myarray[id].Name ? myarray[id].Name : 'default' ) + '.jpg');

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