react-router

问题 I was trying to make a connection to the websocket and get the data in react router. The connection is not happening and getting error Uncaught SyntaxError: Failed to construct 'WebSocket': The URL '[object Object]' is invalid. in the browser console. Using npm start from the terminal to start the application. It is a simple react router application. Below is the react code where I think problem occurred. import React from 'react' export default React.createClass({ getInitialState: function()

问题 I am trying to use the 1.0.0-rc1 react-router and history 2.0.0-rc1 to navigate manually through the website after pressing the button. Unfortunately, after pressing the button I get: Cannot read property 'pushState' of undefined My router code: import React from 'react'; import { Router, Route, Link, browserHistory } from 'react-router' import AppContainer from './components/AppContainer.jsx'; import MyTab from './components/test/MyTab.jsx'; import MainTab from './components/test/MainTab.jsx

问题 I am trying to use the 1.0.0-rc1 react-router and history 2.0.0-rc1 to navigate manually through the website after pressing the button. Unfortunately, after pressing the button I get: Cannot read property 'pushState' of undefined My router code: import React from 'react'; import { Router, Route, Link, browserHistory } from 'react-router' import AppContainer from './components/AppContainer.jsx'; import MyTab from './components/test/MyTab.jsx'; import MainTab from './components/test/MainTab.jsx

问题 Is it possible to apply logic to a component before navigating to a different route? For example, my component looks something like this: class Example extends React.Component { //Handles logic for when user leaves page handlePageExit = () => { console.log("Leaving page..."); } //Set onBeforeUnload event listener so handlePageExit function is called when user closes or refreshes page componentDidMount = () => { window.addEventListener("onbeforeunload", this.handlePageExit); } //This hook is

问题 I'm using react router v4, had some issue reloading the page (not window.location.reload). I better give a real use case to explain the issue, we use a social network app as the example: user A commented a post by user B, a notification appear in user B page. user B clicked on the notification, we do this.props.history.push('/job/' + id') , it worked, hence user B went to job/123 page. user A commented again, new notification appear in user B page, while user B still remain on the job/123

问题 I use History package to redirect invalid URL to 404 page on my react component. I use .replace instead of .push simply because I don't want the browser to record any invalid url I have visited. Have I missed the point here? And is there a trade-off between choosing one or the other for my purpose? Can someone explain to me? thanks in advance ;) 回答1: I think you have the right idea. I personally use .replace when redirecting from an invalid url (or non relevant, i.e. redirect to "profile"

问题 I have a setup similar to the one in this tutorial. How can I render JSON alone (no HTML) without having to specify the port number for the route specified in index.js ? Within my own setup, I can view JSON by visiting https://socialmaya.com/u/real but can't get an actual JSON response unless I visit http://socialmaya.com:5000/actors/real, which is what's being called by React. Here is my code which is an attempt to implement an ActivityPub API for a social network built using the MERN stack.

问题 I have a setup similar to the one in this tutorial. How can I render JSON alone (no HTML) without having to specify the port number for the route specified in index.js ? Within my own setup, I can view JSON by visiting https://socialmaya.com/u/real but can't get an actual JSON response unless I visit http://socialmaya.com:5000/actors/real, which is what's being called by React. Here is my code which is an attempt to implement an ActivityPub API for a social network built using the MERN stack.

问题 I have created my App Navigator component with these libraries react-navigation react-navigation-stack react-navigation-drawer and drawer is nested inside main stack. Drawer stack const DrawerMenu = createDrawerNavigator( { Home: { screen: Home }, MyAccount: { screen: MyAccount } }, { overlayColor: "rgba(0, 0, 0, 0.7)", gestureEnabled: false, initialRouteName: "Home", contentComponent: Drawer, drawerWidth: styles.drawerWidth } ); const DrawerAppContainer = createAppContainer(DrawerMenu); Main

问题 It's my first time using react native and I want to move to another screen (slide2), I have an error which reads "Undefined is not an object (evaluating navigation.navigate)" I am kind of stuck, this is how far I have gone. Please also explaining a bit will be very much appreciated and showing me what to add and where, thank you slideOne.js page code import 'react-native-gesture-handler'; import {NavigationContainer} from '@react-navigation/native'; import {createStackNavigator} from '@react