reactjs

问题 What's the best way to prevent a particular user from accessing a route and any of its subroutes in react-router ? e.g. I have a route /admin/ and it has many other subroutes like /admin/create-user , /admin/settings , etc. Is there another way of preventing users from accessing these routes without indicating on each component some condition like so? if (user.role.name !== "Admin") { return ( <div className="error-page"> <h1>Sorry, you don't have rights to access this page.</h1> </div> ); }

问题 This is a follow-up question from my previous question React.js: Axois Post stay on pending(but i am getting data) My package.json file { "name": "my-app", "version": "0.1.0", "private": true, "dependencies": { "axios": "^0.18.0", "bootstrap": "^4.1.3", "express": "^4.16.3", "mongodb": "^3.1.6", "react": "^16.5.2", "react-dom": "^16.5.2", "react-html-parser": "^2.0.2", "react-router-dom": "^4.3.1", "react-scripts": "1.1.5", "reactstrap": "^6.4.0" }, "scripts": { "start": "react-scripts start"

问题 This is a follow-up question from my previous question React.js: Axois Post stay on pending(but i am getting data) My package.json file { "name": "my-app", "version": "0.1.0", "private": true, "dependencies": { "axios": "^0.18.0", "bootstrap": "^4.1.3", "express": "^4.16.3", "mongodb": "^3.1.6", "react": "^16.5.2", "react-dom": "^16.5.2", "react-html-parser": "^2.0.2", "react-router-dom": "^4.3.1", "react-scripts": "1.1.5", "reactstrap": "^6.4.0" }, "scripts": { "start": "react-scripts start"

问题 I have developed an android mobile app using react-native. My native language for the app is English but I want to make it available in Mandarin Chinese also. So my question is how can I convert my static and fetched data into Mandarin Chinese. please share a solution. 回答1: Yes, you can do it. For changing the Application language to multi-language app,i.e., also include Mandarin Chinese. For Static contents/text Use the package react-native-i18n Link : https://www.npmjs.com/package/react

问题 I'm getting the diagnostic on PageSpeed Insights Ensure text remains visible during webfont load Leverage the font-display CSS feature to ensure text is user-visible while webfonts are loading. Learn more. URL Potential Savings …v1/aWB4m0aac….woff2(fonts.gstatic.com) 10 ms …v21/nuFvD-vYS….woff2(fonts.gstatic.com) 10 ms …v13/6xK3dSBYK….woff2(fonts.gstatic.com) 10 ms And I'm trying to correct it by changing <link rel="stylesheet" href="https://fonts.googleapis.com" /> to <link rel="stylesheet"

问题 I'm using the JExcel javascript library with React. The documentation outlines the approach with Components, but makes use of ReactDOM.findDOMNode() which I believe has been deprecated. I've tried moving it to a functional component, but whilst it does ostensibly work, there is an issue, in that the React component using the class re-renders about 5 times... and each re-render causes the JExcel element to add another sheet! Here's the original example code: import React from "react"; import

问题 Our requirement is to render the bar chart as Expected Image. we are using chartJs library to render the chart. we are able to render the bar chart but for one of the bar we need to show the background color as gradient. To achieve this we used the following below code snippet: but it render as Rendered graph. Can you please help me out in rendering the chart as expected. JSFiddleLink const data = [{ type: "Sample 1", data: [600, 400, 200, 800] }, { type: "Sampel 2", data: [700, 300, 600, 600

问题 React doc class LoggingButton extends React.Component { handleClick() { console.log('this is:', this); } render() { // This syntax ensures `this` is bound within handleClick return ( <button onClick={() => this.handleClick()}> Click me </button> ); } } React doc :- The problem with this syntax is that a different callback is created each time the LoggingButton renders. In most cases, this is fine. However, if this callback is passed as a prop to lower components, those components might do an

问题 I'm trying to call a Modal from non-related component (without using any parent-child relationship). In order to do that I'm trying to use React Redux (as the only way I've seen that can make a connection between two unrelated components). An example on CodeSandbox shows the bare minimum of what I'm trying to do. My issue is that I don't want to include <Modal> inside the <Button> render function. I want to be able to simply flip the flag in Button.js and <Modal> would appear. This is, from

问题 I have a react project in which I would like to use this native node.js addon, which is a wrapper for a C++ SDK. I've successfully used this module in the past within an Electron project, and can run the sample successfully with node as well. My question is how I would be able to use this in React, or write my own React friendly solution using the C++ SDK. I've tried to clone the module and place it under a lib folder in my react project, I ran npm install within that folder to install it's