Events

Every callback is wrapped once by the component, so an inline arrow function is fine. The payload types are on the types page.

onReady

() => void. Fires once, after the first draw with initialValue applied. Ref methods are valid from here, and a call before it operates on an empty document.

onChange

(e: ChangeEvent) => void. Fires once per committed change, composition updates included, with a delta: [start, end) was replaced with text. revision grows by one per change. origin is input for the keyboard, the edit menu and the toolbar methods, api for setText(), replaceRange() and insertText(), and undo or redo for history.

onChangeText

(text: string) => void. The full document after every change, at the cost of one copy per edit. Prefer onChange on large documents.

onSelectionChange

(s: SelectionChangeEvent) => void. The anchor and head in UTF-16 units plus their revision. At most one event per frame.

onScroll

(e: ScrollEvent) => void. The scroll offset and the content extent in dp, without insets. At most one event per frame.

onFocus and onBlur

() => void. Focus follows the native view: a tap, focus(), blur(), or the keyboard closing.

onContentSizeChange

(e: ContentSizeEvent) => void. The view size at which nothing scrolls, contentInsets included, in dp. Sent after a draw whose content size changed, at most once per frame, and the first time before onReady. With soft wrap the value converges over a few frames as lines are measured. The keyboard overlap from avoidKeyboard is not included. See nested in a ScrollView.