Function getData

packages/react-devtools-shared/src/backend/legacy/renderer.js:62–84

(internalInstance: InternalInstance)

type LegacyRenderer = Object;

function getData(internalInstance: InternalInstance) {
  let displayName = null;
  let key = null;

  // != used deliberately here to catch undefined and null
  if (internalInstance._currentElement != null) {
    if (internalInstance._currentElement.key) {
      key = String(internalInstance._currentElement.key);
    }

    const elementType = internalInstance._currentElement.type;
    if (typeof elementType === 'string') {
      displayName = elementType;
    } else if (typeof elementType === 'function') {
      displayName = getDisplayName(elementType);
    }
  }

  return {
    displayName,
    key,
  };
}

function getElementType(internalInstance: InternalInstance): ElementType {
  // != used deliberately here to catch undefined and null