--- title: Pass State as Props to Child Components localeTitle: 将状态作为道具传递给子组件 --- ## 将状态作为道具传递给子组件 在这个挑战中,我们将传递状态,但由于状态是其父组件的本地,我们必须使用**props**传递给子组件。在子组件中使用props将允许我们将所有状态数据保存在父组件中,并且我们可以将数据沿一个方向传递给子组件。 ```javascript class MyApp extends React.Component { constructor(props) { super(props); this.state = { name: 'CamperBot' } } render() { return (
// Here we will call this.state.name in order to pass the value of CamperBot // to the NavBar component
); } }; class Navbar extends React.Component { constructor(props) { super(props); } render() { return (
// Since we passed in the CamperBot state value into the the NavBar component above // the h1 element below will render the value passed from state

Hello, my name is: {this.props.name}

); } }; ```