Target image with substring in source

I am trying to target an image that has a specific substring, Ex: {{name-1-field}} in it's src. I'll be updating the src.

So if I have this:

I tried a general search function to target the wrapping element:

$('*:contains("{{name-1-field}}"):last');

But I guess that only works for text nodes? I'm not sure what would be the best way.

Also, is there a quick way to check the type of the wrapping element? Ie. to make sure it's an image.

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