I know that if I want to have a html field that let’s the user upload a local file I can use
<input type="file"></input>
However, let’s say I am guaranteed that all images will be at a valid absolute URL to an image. How do I let the user specify that? What input type do I use?
You may have to use:
HTML5 has url input types:
Consult the MDN on inputs for more inforation.