MessageInputElement

Full API (methods, signatures, descriptions): see api-reference.md. This note covers only behaviour that isn't obvious from the signatures.

The component clears the text area after submit

Submitting (via submit(), submitByEnter(), or typeAndSubmit(...)) causes the component to clear its text area, so getValue() / assertValue() return empty afterwards. submit() clicks the send button; submitByEnter() presses Enter on the text area.

input.setValue("Test message");
input.assertValue("Test message");
input.submit();

// The component clears the text area after submit
input.assertValue("");

Focus/enabled delegate to the native textarea

FocusableElement and HasEnabledElement operations delegate to the internal native textarea input, not the outer <vaadin-message-input> host.