[英]Don't know how to handle input in my project
I'm working under the to-do list project and have got a problem with adding a comment to my list item. 我在待办事项列表项目下工作,在向清单项目添加评论时遇到问题。 This is what I have right now:
这就是我现在所拥有的:
After adding a list item you should be able to click in this item and a new window with comments will appear. 添加列表项后,您应该可以单击该项目,然后会出现一个带有注释的新窗口。 In the comments section, comments should be added with Ctrl+Enter combination.
在注释部分,应使用Ctrl + Enter组合键添加注释。
I've got a problem with adding comments to the list item (they should be added to the "comments" array of a particular list item). 我在将评论添加到列表项时遇到了问题(它们应添加到特定列表项的“评论”数组中)。
Could you please explain what I'm doing wrong and why my comments aren't adding. 您能否解释一下我做错了什么以及为什么没有添加我的评论。
UPDATE: I've updated my code but the following mistake appears when I press Ctr+Enter to add a comment: [Error] ( http://joxi.ru/Q2KR1G3U4lZJYm ) I've tried to bind the addItem method but no result. 更新:我已经更新了代码,但是当我按Ctr + Enter添加评论时出现以下错误:[错误]( http://joxi.ru/Q2KR1G3U4lZJYm )我试图绑定addItem方法,但没有结果。 What's wrong with the addItem method?
addItem方法有什么问题?
Here is my main component: 这是我的主要组成部分:
App.js App.js
import React, { Component } from 'react';
import './App.css';
import ListInput from './components/listInput'
import ListItem from './components/listItem'
import SideBar from './components/sideBar'
import CommentsSection from './components/commentsSection'
class App extends Component {
constructor(props){
super(props);
this.state = {
items: [
{
id: 0,
text: 'First item',
commentsCount: 0,
comments: [],
displayComment: false
},
{
id: 1,
text: 'Second item',
commentsCount: 0,
comments: [],
displayComment: false
},
{
id: 2,
text: 'Third item',
commentsCount: 0,
comments: [
'Very first comment',
'Second comment',
],
displayComment: false
},
],
nextId: 3,
activeComment: [],
}
}
// Add new item to the list
addItem = inputText => {
let itemsCopy = this.state.items.slice();
itemsCopy.push({id: this.state.nextId, text: inputText});
this.setState({
items: itemsCopy,
nextId: this.state.nextId + 1
})
}
// Remove the item from the list: check if the clicked button id is match
removeItem = id =>
this.setState({
items: this.state.items.filter((item, index) => item.id !== id)
})
setActiveComment = (id) => this.setState({ activeComment: this.state.items[id] });
addComment = (inputComment, activeCommentId ) => {
// find item with id passed and select its comments array
let commentCopy = this.state.items.find(item => item.id === activeCommentId)['comments']
commentCopy.push({comments: inputComment})
this.setState({
comments: commentCopy
})
}
render() {
return (
<div className='App'>
<SideBar />
<div className='flex-container'>
<div className='list-wrapper'>
<h1>Items</h1>
<ListInput inputText='' addItem={this.addItem}/>
<ul>
{
this.state.items.map((item) => {
return <ListItem item={item} key={item.id} id={item.id} removeItem={this.removeItem} setActiveComment={() => this.setActiveComment(item.id)}/>
})
}
</ul>
</div>
<CommentsSection inputComment='' items={this.state.activeComment}/>
</div>
</div>
);
}
}
export default App;
and my Comments Section component: 和我的评论部分组件:
commentsSection.js commentsSection.js
import React from 'react';
import './commentsSection.css';
import CommentInput from './commentInput'
import CommentsItem from './commentsItem'
export default class CommentsSection extends React.Component {
constructor(props){
super(props);
this.state = {value: this.props.inputComment};
this.handleChange = this.handleChange.bind(this);
this.handleEnter = this.handleEnter.bind(this);
this.addComment = this.addComment.bind(this)
}
handleChange = event => this.setState({value: event.target.value})
handleEnter(event) {
if (event.charCode === 13 && event.ctrlKey) {
this.addComment(this.state.value)
}
}
addComment(comment) {
// Ensure the todo text isn't empty
if (comment.length > 0) {
this.props.addComment(comment, this.props.activeComment);
this.setState({value: ''});
}
}
render() {
return (
<div className='component-section'>
<h1>{this.props.items.text}</h1>
<ul>
{ this.props.items.comments &&
this.props.items.comments.map((comment, index) => <p key={index}>{comment}</p>)
}
</ul>
<CommentsItem />
{/*<CommentInput />*/}
<div className='comment-input'>
<input type='text' value={this.state.value} onChange={this.handleChange} onKeyPress={this.handleEnter}/>
</div>
</div>
)
}
}
Change your CommentSection
component addComment
method and handleEnter
method 更改
CommentSection
组件的addComment
方法和handleEnter
方法
addComment(comment) {
// Ensure the todo text isn't empty
if (comment.length > 0) {
// pass another argument to this.props.addComment
// looking at your code pass "this.props.items"
this.props.addComment(comment, this.props.items.id);
this.setState({value: ''});
}
}
handleEnter(event) {
if (event.charCode === 13 && event.ctrlKey) {
// passing component state value property as new comment
this.addComment(this.state.value)
}
}
Change your App
Component addComment
method 更改您的
App
组件的addComment
方法
addComment = (inputComment, activeCommentId )=> {
// find item with id passed and select its comments array
let commentCopy = this.state.items.find(item => item.id === activeCommentId)['comments']
// if you want to push comments as object
// but looking at your code this is not you want
// commentCopy.push({comments: inputComment})
// if you want to push comments as string
commentCopy.push( inputComment)
this.setState({
comments: commentCopy
})
}
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