reactjs

问题 I am not understanding how import works in React. I'm currently using create-react-app . I have a folder inside components folder named images : - src - components - images Insides the components folder I also have a js file named ProductSquare.js . I am trying to import a picture from images folder using this line import bumper from './images/bumper1.png'; I have tried changing it to only bumper1.png and many other options. What am I doing wrong here? ( would appreciate a better way to do it

问题 I am trying to add react-modal to the items of the mapped array. When I click on the onClick event on the mapped items it opens all the modals at once. What I want is top open selected modal at a time. Here I am mapping through the employee's array and adding a button to each of them with onClick modal. const employeeInfo = this.props.employees.map(employee => ( <tr key={employee.employeeId} className="employee_heading"> <td>{employee.name}</td> <td className="actions"> <div className="group"

问题 I'm developing an application with create-react-app and all is going well, except for the fact that I would like to initially serve the index.html from the backend, and am running into trouble doing so. The reason that I want to do this is so that I can inject some user-specific Javascript into the index.html page and also run various other queries when the user initially hits the page (similar to this person) So, instead of connecting to localhost:3000 to view the app, I would instead

问题 I'm using React, OpenLayers & https://tileserver.readthedocs.io/en/latest/index.html to take src for my WebGlPointLayer. I've got a lot of data to display on the highest zoom. Now I'm going to create some filters, so following OpenLayers example (https://openlayers.org/en/latest/examples/filter-points-webgl.html) I've done the same for my porject. The problem is the multiple filters realization. Filter is done by style.variables and style.filter. { variables: defaultVariables, filter: [

问题 The Material-UI Box component allows us to reference other components as follows: import Button from "@material-ui/core/Button"; import Box from "@material-ui/core/Box"; const NewButton = ({ children }) => ( <Box compoment={Button} px={3} py={1} color="white" bgcolor="primary.dark"> {children} </Box> ) This works just as I want it to. However, let me now try it with the Drawer component: import Drawer from "@material-ui/core/Drawer"; import Box from "@material-ui/core/Box"; const NewDrawer =

问题 How do I simulate the touch event in React native? Basically I have X and Y cordinates of an onPress event and want to trigger a touch event at the same position again. This is doable in javascript document.elementFromPoint(x, y).click(); But doable in RN? 来源： https://stackoverflow.com/questions/60994249/react-native-trigger-simulate-touch-event

问题 How do I simulate the touch event in React native? Basically I have X and Y cordinates of an onPress event and want to trigger a touch event at the same position again. This is doable in javascript document.elementFromPoint(x, y).click(); But doable in RN? 来源： https://stackoverflow.com/questions/60994249/react-native-trigger-simulate-touch-event

问题 I'm using react-webcam to capture a selfie for an application. On localhost, react-webcam works perfectly whereas on HTTP hosted web server camera access is being denied by default on the Chrome. Is there any workaround for webcam access or any other npm plugin which can serve the purpose here. NOTE: HTTPS supported sites are allowed to access both the Camera & Microphone. Here, I'm left with only HTTP choice. 回答1: The react-webcam uses the getUserMedia API which specification states: When on

问题 I'm using react-webcam to capture a selfie for an application. On localhost, react-webcam works perfectly whereas on HTTP hosted web server camera access is being denied by default on the Chrome. Is there any workaround for webcam access or any other npm plugin which can serve the purpose here. NOTE: HTTPS supported sites are allowed to access both the Camera & Microphone. Here, I'm left with only HTTP choice. 回答1: The react-webcam uses the getUserMedia API which specification states: When on

问题 I have this timer in ReactJS that uses the computer's clock's time to run, which is supposedly more accurate than incrementing/decrementing the timer by 1 using setInterval with interval of 1 second. However, even when relying on the computer's clock, the timer's time drifts (by comparing it to this clock my app timer drifted 3 seconds in delay after 15 minutes running), and at some point it even stopped completely, while using other tabs in purpose . import React, { useState, useEffect }