jsx

问题 I have an image folder in my create-react-app project with a bunch of images. I want to display every single image in the components. ├── Components │ ├── Icons │ │ ├── Icon.jsx (I want to display every single icon) │ │ ├── Images │ ├── Icons │ │ ├── ... (over 100 SVG icons) In my .jsx file, I want to loop over every image/icon and display it. Icons.jsx import React, { Component } from 'react'; import Icons from '../../Images/Icons'; class Icons extends Component { render() { return ( //Loop

问题 I have an image folder in my create-react-app project with a bunch of images. I want to display every single image in the components. ├── Components │ ├── Icons │ │ ├── Icon.jsx (I want to display every single icon) │ │ ├── Images │ ├── Icons │ │ ├── ... (over 100 SVG icons) In my .jsx file, I want to loop over every image/icon and display it. Icons.jsx import React, { Component } from 'react'; import Icons from '../../Images/Icons'; class Icons extends Component { render() { return ( //Loop

问题 Conditional rendering of components based on window.innerWidth seems to not work as intended just in the production build of Gatsby based website. The hook I am using to check the viewport's width, with the additional check for the window global to avoid Gatsby-node production build errors, is the following: import { useState, useEffect } from 'react' const useWindowWidth = () => { const windowGlobal = typeof window !== 'undefined' if(windowGlobal) { const [width, setWidth] = useState(window

问题 Conditional rendering of components based on window.innerWidth seems to not work as intended just in the production build of Gatsby based website. The hook I am using to check the viewport's width, with the additional check for the window global to avoid Gatsby-node production build errors, is the following: import { useState, useEffect } from 'react' const useWindowWidth = () => { const windowGlobal = typeof window !== 'undefined' if(windowGlobal) { const [width, setWidth] = useState(window

问题 Conditional rendering of components based on window.innerWidth seems to not work as intended just in the production build of Gatsby based website. The hook I am using to check the viewport's width, with the additional check for the window global to avoid Gatsby-node production build errors, is the following: import { useState, useEffect } from 'react' const useWindowWidth = () => { const windowGlobal = typeof window !== 'undefined' if(windowGlobal) { const [width, setWidth] = useState(window

问题 I'm a beginner in React, and I'm a little confused about calling a function in React. I saw the following ways and I don't know when to use each and which one. handleAddTodo ={this.handleAddTodo} handleAddTodo ={this.handleAddTodo()} handleAddTodo ={handleAddTodo} handleAddTodo ={this.handleAddTodo} handleAddTodo ={handleAddTodo()} Are these interchangeable? Could I do that to handle an event, the same way to call a function? 回答1: Are these interchangeable? Short answer: No. Let's take a look

问题 I'm a beginner in React, and I'm a little confused about calling a function in React. I saw the following ways and I don't know when to use each and which one. handleAddTodo ={this.handleAddTodo} handleAddTodo ={this.handleAddTodo()} handleAddTodo ={handleAddTodo} handleAddTodo ={this.handleAddTodo} handleAddTodo ={handleAddTodo()} Are these interchangeable? Could I do that to handle an event, the same way to call a function? 回答1: Are these interchangeable? Short answer: No. Let's take a look

问题 So I've been searching for a solution to this issue. My solution will not build via the command npm run build as I have the error: JSX elements with no children must be self-closing. There is a similar issue here with no accepted (or working) answers: JSX elements with no children must be self-closing The associated Typescript / HTML is of the format: class ExampleClass { render() { return <div> <div> <div>Content 1</div> <div>Content 2</div> <div>Content 3</div> </div> </div>; } } export

问题 I'm using react-select to present the user with a dropdown list of options. I would like it if a specific option is chosen, all other options will disappear. For example, if the "ALL" option is selected, I would like all other options to disappear: As far as I saw, react-select maintains the state of the non-selected options. Can this be controlled via some prop passed to the react-select component? 回答1: You can write related processes in handler , if all is selected, change the option data

问题 In my system I have a few images that a user can have presented and it's extremely advantageous to me to be able to just pass in an id and then have that image be presented to the user. (One use case: Articles in the system have images associated with them, there are many articles in the system, it'd be ideal to pull out just the image-id and have the image dynamically displayed based upon that id. There is no realistic possible way I can statically give an image path for each article.)