admin-page-framework

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Could we have a new field attribute 'scroll_right' => true that fires this JavaScript on the input field?

var foo = document.getElementById("foo");
foo.value = "http://stackoverflow.com/questions/1962168/scroll-to-the-very-right-of-a-long-text-input";
foo.focus();
foo.setSelectionRange(foo.value.length,foo.value.length);

And maybe foo.blur() afterwards.

Use case: in general the URL's beginning is always the same, the end will tell you something.

Good idea.

I posted a sample plugin which includes a custom field type implementing this feature.

You can simply click on the Download link in the following page to get the plugin. https://gist.github.com/michaeluno/d2e32c98f5bf710078ad

Please test it and see if any problems exist. Then it can be included in the core.

By the way, setSelectionRange() did not work in Chrome v35.