react-redux

问题 Scenario - data changes on some of the tables in the database, say using a file upload from another process, like an ETL tool that is not part of the react-redux application. How can we then refresh the react-redux application components? Is web sockets the only to push such a change from server to client? Or do we refresh the affected components at regular intervals? but then all such ports will have to be left open all the time? Backend is a java/oracle application. Thanks 回答1: You should

问题 case 'ADD_TO_CART': { let item = action.payload; let newState = addToCart(state, item); return newState; } const increaseItem = (array = [], dish) => { array.filter((item) => { if (item.id === dish.id) { item.quantity++; } }); return array; } case 'INCREASE_ITEM': { let item = action.payload; console.log('run in increase') let newState = increaseItem(state, item); return newState; } Here is the code. Problem is when the properties quantity increase, redux think the state has no change so

问题 case 'ADD_TO_CART': { let item = action.payload; let newState = addToCart(state, item); return newState; } const increaseItem = (array = [], dish) => { array.filter((item) => { if (item.id === dish.id) { item.quantity++; } }); return array; } case 'INCREASE_ITEM': { let item = action.payload; console.log('run in increase') let newState = increaseItem(state, item); return newState; } Here is the code. Problem is when the properties quantity increase, redux think the state has no change so

问题 My react+redux app is not working on Internet explorer 11. It is working fine on edge, Firefox and chrome. I have already tried so many answers available on internet like this but didn't get any success, below attached error is I am getting in console when I opened this error it shows like this this file is generating when I am serving my app and can't change anything manually package.json { "jest": { "roots": [ "<rootDir>/" ], "moduleFileExtensions": [ "js", "jsx", "json" ], "testURL": "http

问题 I am implementing server-side rendering using redux-saga. I am following the "real world" example provided in the redux-saga repository. node.js entry-point uses react.js renderToString to render the application. rendering the application triggers componentWillMount , which dispatches actions GET_GEOLOCATION and GET_DATE . These async actions will resolve with SET_GEOLOCATION and SET_DATE . renderToString finishes rendering the application; END action terminates the saga listeners The problem

问题 I have a React-Redux-KoaJs application with multiple components. I have few user roles as well. Now i want to display few buttons, tables and div to only specific roles and hide those from others. Please remember i dont want to hide the whole component, but just a part of the components. Can anyone help me? Thanks in advance. 回答1: Be careful with that. If the actions of some roles are important you should always validate them at your backend. It's easy to change the values stored in redux at

问题 Is it possible to map redux state to a regular javascript function rather than a React component? If not, is there another way for connecting redux state to a function? (obviously without explicitly passing it in as a param) I have tried connecting to a function, but it breaks (I don't have an exact error message. the server just hits an uncaughtException). Since React components can be pure functions, does connect() only work with a class ComponentName extends Component (and the likes)? The

问题 Is it possible to map redux state to a regular javascript function rather than a React component? If not, is there another way for connecting redux state to a function? (obviously without explicitly passing it in as a param) I have tried connecting to a function, but it breaks (I don't have an exact error message. the server just hits an uncaughtException). Since React components can be pure functions, does connect() only work with a class ComponentName extends Component (and the likes)? The

问题 I am new to the react redux . I am trying to write a unit test case for a component search functionality which looks like, constructor(props) { super(props); this.staate = { search : '' } } onInputChnage = (e) => { this.setState({ search: e.target.value }); } render() { const { jobs: { content } } = this.props; const { search } = this.state; const filteredList = content.filter(job => (job.jdName && job.jdName.toLowerCase().includes(search.toLowerCase())) || (job.technology && job.technology

问题 I am new to the react redux . I am trying to write a unit test case for a component search functionality which looks like, constructor(props) { super(props); this.staate = { search : '' } } onInputChnage = (e) => { this.setState({ search: e.target.value }); } render() { const { jobs: { content } } = this.props; const { search } = this.state; const filteredList = content.filter(job => (job.jdName && job.jdName.toLowerCase().includes(search.toLowerCase())) || (job.technology && job.technology