updateTextarea() — react Function Reference

Source Code

packages/react-dom-bindings/src/client/ReactDOMTextarea.js lines 64–91

export function updateTextarea(
  element: Element,
  value: ?string,
  defaultValue: ?string,
) {
  const node: HTMLTextAreaElement = (element: any);
  if (value != null) {
    // Cast `value` to a string to ensure the value is set correctly. While
    // browsers typically do this as necessary, jsdom doesn't.
    const newValue = toString(getToStringValue(value));
    // To avoid side effects (such as losing text selection), only set value if changed
    if (newValue !== node.value) {
      node.value = newValue;
    }
    // TOOO: This should respect disableInputAttributeSyncing flag.
    if (defaultValue == null) {
      if (node.defaultValue !== newValue) {
        node.defaultValue = newValue;
      }
      return;
    }
  }
  if (defaultValue != null) {
    node.defaultValue = toString(getToStringValue(defaultValue));
  } else {
    node.defaultValue = '';
  }
}