react-props

问题 I have been stuck for a few hours now.. I am trying to send a component new props... but It wont get the new ones. Here is what happens. First the user clicks a button on the post component... It fires the function, 'add favorites' and 'addFavs' on the parent component below. These two functions determine if it should add the user to favorites or delete the user from favorites. When the user is added as a favorite, the button they clicked, inside the searchResults component, appears a

问题 I have an array of posts that I am trying to sort by date - I cant figure out how to get access to the date though, since the array is a list of react components, not objects. Here is how the code is working now... The user searches for 'bands' and it creates an array of all the band objects. Each band object has a bunch of posts in band.posts. So to get all the posts out of all of the bands I map through all the bands, then for each band I map through all of their posts. Each post then goes

问题 I have an array of posts that I am trying to sort by date - I cant figure out how to get access to the date though, since the array is a list of react components, not objects. Here is how the code is working now... The user searches for 'bands' and it creates an array of all the band objects. Each band object has a bunch of posts in band.posts. So to get all the posts out of all of the bands I map through all the bands, then for each band I map through all of their posts. Each post then goes

问题 I have a parent component which is a flat list which contains a header HeaderComponent . This HeaderComponent is a custom component that I have created which contains 2 child components of its own. Whenever i refresh the list, I am passing a boolean to the HeaderComponent as props which get passed onto its own children, I am doing this so I can check if each component needs to fetch new data or not. The problem is that whenever the parent refreshes and sets a new state the constructors of the

问题 Iam using Ant Design for React Js UI. Am using Tree component to show up in the list. I also have 2 button to expand and collapse the Tree list. I use the defaultExpandAll prop to manage this. On the expand and collapse button click i set a bool to true and false respectively. Button it doesn't expand on the button click. If I set True initially to that flag state it works. Is there any work Around. I have 2 components. (Expand and collapse button are in parent component) **Parent Component**

问题 Iam using Ant Design for React Js UI. Am using Tree component to show up in the list. I also have 2 button to expand and collapse the Tree list. I use the defaultExpandAll prop to manage this. On the expand and collapse button click i set a bool to true and false respectively. Button it doesn't expand on the button click. If I set True initially to that flag state it works. Is there any work Around. I have 2 components. (Expand and collapse button are in parent component) **Parent Component**

问题 I am using the following Navbar. I would like to pass some props to Nav.Link. I don't know how to pass the property to Nav.Link. Or is it just like HTML href="a.html?param=test"? const Navigation = (props) => { console.log(props); return ( <Navbar bg="primary" variant="dark"> <Navbar.Brand href="/">Dating Service</Navbar.Brand> <Navbar.Toggle aria-controls="basic-navbar-nav" /> <Navbar.Collapse id="basic-navbar-nav"> <Nav className="ml-auto"> <Nav.Link href="/">Home</Nav.Link> <Nav.Link href=

问题 am new to react native and i have 2 js file(Component). 1 of the file is the modal jsx and i want to open this modal from other js file. Modal JS file import React, {Component} from 'react'; import { Platform, Text,View, StyleSheet, TouchableOpacity} from 'react-native'; import Modal from 'react-native-modal'; import { Icon, Picker, Form, Item, Button, Input} from 'native-base'; export default class MyPopup extends Component{ state = { isModalVisible: this.props.isModalVisible }; constructor(

问题 I have an object contains multiple common key-value props, that I want to pass on to some jsx. Something like this: const commonProps = {myProp1: 'prop1',myProp2: 'prop2'}; <MyJsx commonProps /> I want this to function as passing individual props: <MyJsx myProp1={commonProps.myProp1} myProp2={commonProps.myProp2}/> Is this possible? 回答1: Is this possible? Yes, why you think its not possible, but the way you are sending is not correct. Meaning of <MyJsx commonProps /> is: <MyJsx commonProps=

问题 I'm working in a new codebase. Normally, I would set up state like this in a React component: class App extends React.Component { constructor() { super(); this.state={ foo: 'bar' } } .... In this new codebase, I'm seeing a lot of this: class App extends React.Component { state={ foo: 'bar' } .... Is there an advantage to doing it this way? They seem to only do it when state doesn't need to be altered. I always thought of state as being something React handled. Is this an ok thing to do? 回答1: