reactjs

问题 Router is rendering the page on the same page than to generate a new page. What might be the problem? Whenever I click the link Polls , it renders the page only there but the URL is shown as changed in the browser. Polls.js import React from 'react'; import {Link} from "react-router-dom"; class Polls extends React.Component{ render() { return( <div> <h1>Polls Page</h1> <p>This is Polls Page </p> </div> ) } } export {Polls} Choices.js import { BrowserRouter as Router, Route, Link } from "react

问题 im building a react app and i imported a slider in a file and then i got a css-loader, im also using webpack here is my slider - import React, {useState} from 'react'; import RubberSlider from '@shwilliam/react-rubber-slider'; import styles from '@shwilliam/react-rubber-slider/dist/styles.css'; export const Slider = () => { const [value, setValue] = useState(0.5) return <RubberSlider width={250} value={value} onChange={setValue} /> } this ^ will go in another component and get called on but

问题 im building a react app and i imported a slider in a file and then i got a css-loader, im also using webpack here is my slider - import React, {useState} from 'react'; import RubberSlider from '@shwilliam/react-rubber-slider'; import styles from '@shwilliam/react-rubber-slider/dist/styles.css'; export const Slider = () => { const [value, setValue] = useState(0.5) return <RubberSlider width={250} value={value} onChange={setValue} /> } this ^ will go in another component and get called on but

问题 I have a situation where I need to show grouped lists of items: https://v0.material-ui.com/#/components/list (Go to Nested Lists) Can redux-form Select field work with options as <ListItem /> instead of <MenuItem /> ? I can't select any item from the nested dropdown. Redux's onChange callback doesn't fire up. Here is the code: Form: <form> <Field name="camops" normalize={normalizeMultipleSelectValues} component={MySelectFormField} floatingLabelText="Item(s)" fullWidth multiple /> </form>

问题 I have a situation where I need to show grouped lists of items: https://v0.material-ui.com/#/components/list (Go to Nested Lists) Can redux-form Select field work with options as <ListItem /> instead of <MenuItem /> ? I can't select any item from the nested dropdown. Redux's onChange callback doesn't fire up. Here is the code: Form: <form> <Field name="camops" normalize={normalizeMultipleSelectValues} component={MySelectFormField} floatingLabelText="Item(s)" fullWidth multiple /> </form>

问题 try set header, in Ajax Request using axios import React, { Component, PropTypes } from 'react' import { Link, browserHistory } from 'react-router' import { connect } from 'react-redux' import axios from 'axios' class Income extends Component { constructor(props) { super(props) this.state = { }; } componentDidMount() { axios.post('http://139.196.141.166:8084/course/income/outline', { headers: { 'X-Authenticated-Userid': '15000500000@1' } }) .then(function (response) { console.log(response); }

问题 Is it possible to change the default IconComponent="ArrowDropDownIcon" to CustomIcon using props in createMuiTheme ? I would like to get something like this: const theme = createMuiTheme({ ... props: { MuiSelect: { IconComponent: "CustomIcon", }, }, ... }); 回答1: Below is an example showing three different icons for the Select . The first is the default, the second is explicitly overridden using the prop, and the third leverages the default icon prop override specified in a custom theme. The

问题 I've installed react-native-image-picker successfully, for a fresh react native app, linked it and given right permissions via the info.plist file to access camera, photos etc... I'm using the code from the ReadMe on react-native-image-picker page, but i receive an error When attempting to openGallery() i get the following warning and no image library opens: Possible unhandled Promise Rejection TypeError; undefined is not a function (near...reactNativeImagePicker.default.launchImageLibrary...

问题 const { useState } = React; const App = () => { const [num, setNum] = useState(0); return ( <input type="number" value={num} onChange={(e)=>setNum(parseInt(e.target.value))} /> ) } ReactDOM.render(<App />, document.getElementById('root')); <script crossorigin src="https://unpkg.com/react@16/umd/react.development.js"></script> <script crossorigin src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script> <div id="root" /> I want to keep num 's type as Number , not String . but

问题 const { useState } = React; const App = () => { const [num, setNum] = useState(0); return ( <input type="number" value={num} onChange={(e)=>setNum(parseInt(e.target.value))} /> ) } ReactDOM.render(<App />, document.getElementById('root')); <script crossorigin src="https://unpkg.com/react@16/umd/react.development.js"></script> <script crossorigin src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script> <div id="root" /> I want to keep num 's type as Number , not String . but