Javascript 显示react中每个动态div的组件
我正在尝试为动态生成的div呈现一个组件HomeScreen.js。我可以让它在某种程度上正常工作,但我无法将组件从动态生成的div中分离出来,而且我只尝试为单击的div呈现HomeScreen.js,但是我目前拥有的功能为所有div打开HomeScreen.js (这是一个联系人应用程序,动态生成的div是联系人。我只是尝试显示每个单击联系人的联系人信息) 我已经附上了当前功能的截图和我试图获得的功能的截图 我需要一些洞察力Javascript 显示react中每个动态div的组件,javascript,html,reactjs,render,Javascript,Html,Reactjs,Render,我正在尝试为动态生成的div呈现一个组件HomeScreen.js。我可以让它在某种程度上正常工作,但我无法将组件从动态生成的div中分离出来,而且我只尝试为单击的div呈现HomeScreen.js,但是我目前拥有的功能为所有div打开HomeScreen.js (这是一个联系人应用程序,动态生成的div是联系人。我只是尝试显示每个单击联系人的联系人信息) 我已经附上了当前功能的截图和我试图获得的功能的截图 我需要一些洞察力 import store from '../libs/store
import store from '../libs/store.js';
var jsforce = require('jsforce');
class menuScreen extends React.Component {
constructor(props) {
super(props)
const data = store.getState();
this.state = {
username: '',
messages: data.messages,
records: [],
showModal: false,
showChat: false
}
}
handleSearch(e) {
this.setState({
username: e.target.value
})
}
handleChange(evt) {
this.setState({
username: evt.target.value.substr(0, 100)
});
}
onClick(e) {
e.preventDefault();
this.setState({
showChat: !this.state.showChat
})
}
onLinkClicked() {
var conn = new jsforce.Connection({
serverUrl: 'https://cs63.salesforce.com',
accessToken: sessionStorage.getItem('token')
})
var parent = this.state.username
//console.log(this.state.username)
conn.sobject("Contact").find({
LastName: {
$like: parent
}
}, 'Id, Name, Phone, Account.Name'
).sort('-CreatedDate Name').
limit(5).skip(10).execute(function(err, records) {
if (err) {
return console.error(err);
}
for (var i = 0; i < records.length; i++) {
var record = (records[i]);
console.log("Name: " + record.Name);
console.log("Phone: " + record.Phone);
console.log("Account Name: " + record.Account.Name);
}
this.setState({
records: records
})
this.setState({
showChat: !this.state.showChat
})
}.bind(this))
}
render() {
return (
<div className='menubox' id='menubox'>
<div className="boxbox">
<input className="search" type="text" placeholder="Contact Last Name" onChange={this.handleChange.bind(this)} value={this.state.username} />
<input className="submit" type="submit" onClick={this.onLinkClicked.bind(this)} value="GO" /></div>
<div>
<div>
{this.state.records.map(record => (
<div className="info-block block-info clearfix">
<div className="square-box pull-left">
<span className="glyphicon glyphicon-user glyphicon-lg"></span>
</div>
<h5>{record.Name}</h5>
<h4>{record.Phone}</h4>
<p>{record.Account.Name}</p>
**//Trying to render home.js when Chat Bubble is clicked.**
<a onClick={this.onClick.bind(this)}>
<img src="./img/speechbubble.png" className="textIcon" />
{this.state.showChat && < HomeScreen / >}
</a>
</div>
))}
</div>
</div>
</div>
)
}
}
export default menuScreen;
从“../libs/store.js”导入存储;
var jsforce=require('jsforce');
类menuScreen扩展了React.Component{
建造师(道具){
超级(道具)
const data=store.getState();
此.state={
用户名:“”,
消息:data.messages,
记录:[],
showModal:错,
showChat:false
}
}
handleSearch(e){
这是我的国家({
用户名:e.target.value
})
}
手柄更换(evt){
这是我的国家({
用户名:evt.target.value.substr(01100)
});
}
onClick(e){
e、 预防默认值();
这是我的国家({
showChat:!this.state.showChat
})
}
onLinkClicked(){
var conn=新的jsforce.Connection({
服务器URL:'https://cs63.salesforce.com',
accessToken:sessionStorage.getItem('token')
})
var parent=this.state.username
//console.log(this.state.username)
conn.sobject(“联系人”)。查找({
姓氏:{
$like:家长
}
},'Id,Name,Phone,Account.Name'
).sort('-CreatedDate名称')。
限制(5).跳过(10).执行(函数)(错误,记录){
如果(错误){
返回控制台。错误(err);
}
对于(var i=0;i(
{record.Name}
{record.Phone}
{record.Account.Name}
**//尝试在单击聊天气泡时呈现home.js**
{this.state.showChat&&
))}
)
}
}
导出默认菜单屏幕;
原因是,您使用单个状态变量来控制所有动态div
,您需要使用一个数组,每个元素的每个值,因此在状态变量中使用showChat=[]
而不是showChat=false
。要更改onClick
函数中array
的值,您需要传递onClick
函数中元素的索引,并使用该索引更改特定值
对于其他更改,请检查代码和注释,它应该可以工作
使用以下命令:
import store from '../libs/store.js';
var jsforce = require('jsforce');
class menuScreen extends React.Component {
constructor(props) {
super(props)
const data = store.getState();
this.state = {
username: '',
messages: data.messages,
records: [],
showModal: false,
showChat: [] //initially blank array
}
}
handleSearch(e) {
this.setState({
username: e.target.value
})
}
handleChange(evt) {
this.setState({
username: evt.target.value.substr(0, 100)
});
}
onClick(i, e) { // pass the index on item clicked
e.preventDefault();
let showChat = this.state.showChat.slice();
showChat[i] = !showChat[i]; //use that index to change the specific value
this.setState({ showChat })
}
onLinkClicked() {
var conn = new jsforce.Connection({
serverUrl: 'https://cs63.salesforce.com',
accessToken: sessionStorage.getItem('token')
})
var parent = this.state.username
//console.log(this.state.username)
conn.sobject("Contact").find({
LastName: {
$like: parent
}
}, 'Id, Name, Phone, Account.Name'
).sort('-CreatedDate Name').
limit(5).skip(10).execute((err, records) => { //use arrow function
if (err) {
return console.error(err);
}
// this loop is not required
/*
for (var i = 0; i < records.length; i++) {
var record = (records[i]);
console.log("Name: " + record.Name);
console.log("Phone: " + record.Phone);
console.log("Account Name: " + record.Account.Name);
}
*/
console.log('recoreds values', records);
this.setState({
records: records,
})
})
}
render() {
return (
<div className='menubox' id='menubox'>
<div className="boxbox">
<input className="search" type="text" placeholder="Contact Last Name" onChange={this.handleChange.bind(this)} value={this.state.username} />
<input className="submit" type="submit" onClick={this.onLinkClicked.bind(this)} value="GO" /></div>
<div>
<div>
/*use the index also in map*/
{this.state.records.map((record, i) => (
<div className="info-block block-info clearfix">
<div className="square-box pull-left">
<span className="glyphicon glyphicon-user glyphicon-lg"></span>
</div>
<h5>{record.Name}</h5>
<h4>{record.Phone}</h4>
<p>{record.Account.Name}</p>
<a onClick={this.onClick.bind(this, i)}>
<img src="./img/speechbubble.png" className="textIcon" />
{this.state.showChat[i] && < HomeScreen / >}
{/*use this.state.showChat[i] specific value*/}
</a>
</div>
))}
</div>
</div>
</div>
)
}
}
export default menuScreen;
直接使用:
onChange={this.handleChange}
我同意Mayank关于在showChat中使用数组的回答,但是基于这个想法,有什么原因不能让每个联系人都成为一个单独的组件?就我个人而言,我会渲染一系列子组件,比如Contact组件或其他东西,并从外部菜单屏幕组件中的状态向每个子组件传递道具
class Contact extends React.Component {
constructor(props) {
super(props)
this.state = {}
}
render() {
return (
<div className="info-block block-info clearfix">
<div className="square-box pull-left">
<span className="glyphicon glyphicon-user glyphicon-lg"></span>
</div>
<h5>{record.Name}</h5>
<h4>{record.Phone}</h4>
<p>{record.Account.Name}</p>
<a onClick={this.props.onClick}>
<img src="./img/speechbubble.png" className="textIcon" />
{this.props.showChat && < HomeScreen / >}
</a>
</div>
)
}
}
类联系人扩展了React.Component{
建造师(道具){
超级(道具)
this.state={}
}
render(){
返回(
{record.Name}
{record.Phone}
{record.Account.Name}
{this.props.showChat&&
)
}
}
然后您可以在menuScreen组件中使用它,如下所示:
import store from '../libs/store.js';
var jsforce = require('jsforce');
class menuScreen extends React.Component {
constructor(props) {
super(props)
const data = store.getState();
this.state = {
username: '',
messages: data.messages,
records: [],
showModal: false,
showChat: []
}
}
handleSearch(e) {
this.setState({
username: e.target.value
})
}
handleChange(evt) {
this.setState({
username: evt.target.value.substr(0, 100)
});
}
onClick(i, e) {
e.preventDefault();
let showChat = this.state.showChat.slice();
showChat[i] = !showChat[i];
this.setState({ showChat })
}
onLinkClicked() {
var conn = new jsforce.Connection({
serverUrl: 'https://cs63.salesforce.com',
accessToken: sessionStorage.getItem('token')
})
var parent = this.state.username
//console.log(this.state.username)
conn.sobject("Contact").find({
LastName: {
$like: parent
}
}, 'Id, Name, Phone, Account.Name'
).sort('-CreatedDate Name').
limit(5).skip(10).execute((err, records) => {
if (err) {
return console.error(err);
}
// this loop is not required
/*
for (var i = 0; i < records.length; i++) {
var record = (records[i]);
console.log("Name: " + record.Name);
console.log("Phone: " + record.Phone);
console.log("Account Name: " + record.Account.Name);
}
*/
console.log('recoreds values', records);
this.setState({
records: records,
})
})
}
render() {
return (
<div className='menubox' id='menubox'>
<div className="boxbox">
<input className="search" type="text" placeholder="Contact Last Name" onChange={this.handleChange.bind(this)} value={this.state.username} />
<input className="submit" type="submit" onClick={this.onLinkClicked.bind(this)} value="GO" /></div>
<div>
<div>
{this.state.records.map((record, i) => (
<Contact onClick={onClick.bind(this, i)} showChat={this.state.showChat[i]} />
))}
</div>
</div>
</div>
)
}
}
export default menuScreen;
从“../libs/store.js”导入存储;
var jsforce=require('jsforce');
类menuScreen扩展了React.Component{
建造师(道具){
超级(道具)
const data=store.getState();
此.state={
用户名:“”,
消息:data.messages,
记录:[],
showModal:错,
showChat:[]
}
}
handleSearch(e){
这是我的国家({
用户名:e.target.value
})
}
手柄更换(evt){
这是我的国家({
用户名:evt.target.value.substr(01100)
});
}
onClick(即,e){
e、 预防默认值();
让showChat=this.state.showChat.slice();
showChat[i]=!showChat[i];
this.setState({showChat})
}
onLinkClicked(){
var conn=新的jsforce.Connection({
服务器URL:'https://cs63.salesforce.com',
accessToken:sessionStorage.getItem('token')
})
var parent=this.state.username
//console.log(this.state.username)
conn.sobject(“联系人”)。查找({
拉斯顿
import store from '../libs/store.js';
var jsforce = require('jsforce');
class menuScreen extends React.Component {
constructor(props) {
super(props)
const data = store.getState();
this.state = {
username: '',
messages: data.messages,
records: [],
showModal: false,
showChat: []
}
}
handleSearch(e) {
this.setState({
username: e.target.value
})
}
handleChange(evt) {
this.setState({
username: evt.target.value.substr(0, 100)
});
}
onClick(i, e) {
e.preventDefault();
let showChat = this.state.showChat.slice();
showChat[i] = !showChat[i];
this.setState({ showChat })
}
onLinkClicked() {
var conn = new jsforce.Connection({
serverUrl: 'https://cs63.salesforce.com',
accessToken: sessionStorage.getItem('token')
})
var parent = this.state.username
//console.log(this.state.username)
conn.sobject("Contact").find({
LastName: {
$like: parent
}
}, 'Id, Name, Phone, Account.Name'
).sort('-CreatedDate Name').
limit(5).skip(10).execute((err, records) => {
if (err) {
return console.error(err);
}
// this loop is not required
/*
for (var i = 0; i < records.length; i++) {
var record = (records[i]);
console.log("Name: " + record.Name);
console.log("Phone: " + record.Phone);
console.log("Account Name: " + record.Account.Name);
}
*/
console.log('recoreds values', records);
this.setState({
records: records,
})
})
}
render() {
return (
<div className='menubox' id='menubox'>
<div className="boxbox">
<input className="search" type="text" placeholder="Contact Last Name" onChange={this.handleChange.bind(this)} value={this.state.username} />
<input className="submit" type="submit" onClick={this.onLinkClicked.bind(this)} value="GO" /></div>
<div>
<div>
{this.state.records.map((record, i) => (
<Contact onClick={onClick.bind(this, i)} showChat={this.state.showChat[i]} />
))}
</div>
</div>
</div>
)
}
}
export default menuScreen;