Issue with Keypress

WEB TMS WEB Core
1

Under TMS WEB Core 3.0.3.0, TCustomControl.HandleDoKeyPress (the native keypress listener bound to input controls) calls GetKeyChar(AEvent.key) to translate the browser's KeyboardEvent.key into the Char passed to a component's OnKeyPress. When AEvent.key is undefined — which happens with certain synthetic/programmatic key events rather than genuine user keystrokes (in our case, reproducibly reported when a client tapped the Safari QuickType autofill suggestion to fill a saved password on an iPad, on the second login attempt after an initial failed attempt) — GetKeyChar's fallback branch executes the following with no guard:

Result = AValue.charAt(0);

...which throws:

TypeError: undefined is not an object (evaluating 'AValue.charAt')

This aborts the event entirely — no OnKeyPress handler ever fires.

Notably, the sibling function GetKeyCode (used for OnKeyDown/OnKeyUp, same unit) already defends against exactly this case. Its equivalent fallback is:

if (pas.System.Assigned(AValue) && (AValue.length > 0)) {
  i = AValue.charCodeAt(1 - 1);
  ...
}

So GetKeyChar appears to simply be missing the same null/empty check that GetKeyCode already has.

Suggested fix: add an equivalent Assigned(AValue) and (AValue <> '') guard to GetKeyChar's final else branch, returning #0 (matching IsKeyCharacter's and HandleDoKeyPress's existing handling of a null/#0 result) when AValue is empty or unassigned, instead of unconditionally calling .charAt(0) on it.

2

Thanks for reporting.
We applied an improvement for this and the next update of TMS WEB Core will include this improvement.