广州企业网站找哪里,建设搜索引擎友好的网站,广告设计制作属于什么行业,黄金网站app大全一、介绍 本文将会基于react实现表单的功能#xff0c;包括表单提交和跳转、错误处理、动态表单元素、动态内容加载。
二、使用教程
1.表单提交功能
export default class FormSubmit extends React.PureComponent{state {name: }handleNameChange evt …一、介绍 本文将会基于react实现表单的功能包括表单提交和跳转、错误处理、动态表单元素、动态内容加载。
二、使用教程
1.表单提交功能
export default class FormSubmit extends React.PureComponent{state {name: }handleNameChange evt {this.setState({name: evt.target.value});}handleSubmit evt {evt.preventDefault(); // 阻止默认事件if (!this.state.name){this.setState({error: Name is required});return;}fetchUserList(this.state.name); }const {userState, fetchUserList} useFetchUserList();render(){return (form className comment-box onSubmit {this.handleSubmit}divlabelName:/label input value {this.state.name} onchange {this.handleNameChange}//divdivbuttonSubmit/button/div/form{userState.data uluserState.data.map((user) liuser.name/li)/ul}/) }}
user-service.js
const initialState {data:[], isLoading:false, error:null};// reducer
function reducer(state, action){switch (action.type){case FETCH_USER_LIST_BEGIN:return (data:[action.res.data], isLoading: true, error:null);case FETCH_USER_LIST_SUCCESS:return (...state, isLoading: false, error:null);case FETCH_USER_LIST_ERROR:return (...state, isLoading: false, error:res.data.error);}}const [state, dispatch] useReducer(reducer, initialState);function fetchUserList(){dispatch({type: FETCH_USER_LIST_BEGIN}); const doRequest axios.get(http://www.user.com/user/list);doRequest.then(res {dispatch({type: FETCH_USER_LIST_BEGIN,data: res.data});},err {dispatch({type: FETCH_USER_LIST_ERROR,data: {error:err}});});
}export default userFetchUserList () {state, fetchUserList}
2.动态表单元素 (TODO)
