react-router

问题 I send a certain id (idValue) to my component and use it like this: componentDidMount() { this.onHandleFetch(this.props.params.idValue); } But sometimes this component opens without any input parameters (without idValue) and I got this error: TypeError: Cannot read property 'idValue' of undefined How can I fix it? I've tried to use typeof , but it was unsuccessful In the component from which the value is transferred, I use context router 回答1: static defaultProps = { params:{} } 回答2: The error

问题 I send a certain id (idValue) to my component and use it like this: componentDidMount() { this.onHandleFetch(this.props.params.idValue); } But sometimes this component opens without any input parameters (without idValue) and I got this error: TypeError: Cannot read property 'idValue' of undefined How can I fix it? I've tried to use typeof , but it was unsuccessful In the component from which the value is transferred, I use context router 回答1: static defaultProps = { params:{} } 回答2: The error

问题 I have my react-router component such as : <Switch> <Route path="/abc" render={() => <ComponentTemplateABC component={containerABC} />} /> <Route path="/def" render={() => <ComponentTemplateDEF component={containerDEF} />} /> ... ... </Switch> I wish to test the routing to ensure the respective component is rendered for each route. However, I do not wish to use mount for testing the routing, only wish to use shallow rendering. Below is what my test looks like currently: test('abc path should

问题 I need help to stop making same API calls again on route change. I tried to find the solution available on the web and on stackoverflow, but I am not able to figure out what changes require to fix this thing. I also tried to use sessionStorage to store one flag that if API calls fired then flag set to true and on router change I check if flag is true then don't make any API calls. But then it blanks the list of articles. I have one main App component with routes, which contains two components

问题 I need help to stop making same API calls again on route change. I tried to find the solution available on the web and on stackoverflow, but I am not able to figure out what changes require to fix this thing. I also tried to use sessionStorage to store one flag that if API calls fired then flag set to true and on router change I check if flag is true then don't make any API calls. But then it blanks the list of articles. I have one main App component with routes, which contains two components

问题 I need help to stop making same API calls again on route change. I tried to find the solution available on the web and on stackoverflow, but I am not able to figure out what changes require to fix this thing. I also tried to use sessionStorage to store one flag that if API calls fired then flag set to true and on router change I check if flag is true then don't make any API calls. But then it blanks the list of articles. I have one main App component with routes, which contains two components

问题 I am trying to make a one page app where you click the link and it scrolls down to the section corresponding to the menu item. I have spent days researching for a fix that suits my criteria and unfortunately, I am having very little luck. My criteria is as follows: No external dependencies Must have the url in the address bar (to allow direct links to the particular section) Must not be hacky (i.e Injecting the URL into the address bar) Must be as simple as possible I hope that isn't asking

问题 I'm trying to implement a facebook-like homepage (i.e. a list of posts with comments). PostList is the component in charge of loading the post list (using fetch in its componentDidMount() ), itself being a child of the component HomePage . I have another component for the navigation bar called NavBar with a <Link> component (from react-router-dom ) to the route of my HomePage component ('/'). When I'm on any page other than '/', using the link works fine: the Router mounts HomePage , and then

问题 Getting crazy about this issue I have.. Firstly, I am still new to React, secondly, before posting, I tried: Passing custom props to router component in react-router v4 and react Child component not receiving props But no luck.. what I am trying to achieve, is simply add routing to existing React project. For example top (father) class looks like this: import * as React from "react"; import { RouteProps } from "react-router"; import { IAppSettings, IAppConfig, IDataAccess } from "..

问题 I am using react-router 2. My routes are defined as <Route path="/" component={App}> <IndexRoute component={Home}/> <Route path="/about" component={About}/> <Route path="/login" component={Login} onEnter={redirectToDashboard}/> <Route path="/logout" component={Logout} onEnter={logoutSession}/> <Route path="/dashboard" component={Dashboard} onEnter={redirectToLogin}/> </Route> Everything working fine but I am having problem disabling back button from my dashboard page. After successful login I