ReactElement

common field

• $$typeof: REACT_ELEMENT_TYPE
• type: function or constructor
• key: string
• ref: ref
• props: props
• _owner: owner

development

• _store: object
• _store.validated: boolean
• __self: _self
• _source: source // source file

field

updater = classComponentUpdater

field Of protoType

Function Of prototype

setState

element is freeze

import

WorkInProgress