prompt() cancel button does not work

[simonw]

If you click cancel after entering text it behaves the same as if you had clicked OK:

[simonw]

I tried a few more rounds with Claude but it didn't manage to fix the bug: https://gist.github.com/simonw/590ddbb627424127e0d3d76e597d71d6

End result here - note that clicking "Cancel" still does the wrong thing: https://static.simonwillison.net/static/2024/claude-bug-prompts/prompts-js.html

I may have to fix this by hand!

[simonw]

Here's the cause of the bug:

prompts-js/index.js

Lines 157 to 162 in cecf4a8

	// Handle form submission
	form.addEventListener("submit", (e) => {
	e.preventDefault();
	dialog.returnValue = "ok";
	dialog.close();
	});