Javascript 如何在ReactJS中单击按钮时动态显示html内容?
我制作了2个按钮和1个输入框,用于显示JSON数据中的日期。当我点击递增或递减按钮时,它应该显示Javascript 如何在ReactJS中单击按钮时动态显示html内容?,javascript,html,json,reactjs,Javascript,Html,Json,Reactjs,我制作了2个按钮和1个输入框,用于显示JSON数据中的日期。当我点击递增或递减按钮时,它应该显示数据。可用的\u插槽[0]。数据\u插槽 如果data.available\u slots[this.state.counter].data\u slots===0则在输入框之外应该显示“今天没有可用的插槽” data.js: const data = { "template_type": "slot_picker", "selection_color": "#0000
数据。可用的\u插槽[0]。数据\u插槽
如果data.available\u slots[this.state.counter].data\u slots===0
则在输入框之外应该显示“今天没有可用的插槽”
data.js:
const data = {
"template_type": "slot_picker",
"selection_color": "#000000",
"secondary_color": "#808080",
"title": "Available Slots for Dr. Sumit",
"available_slots": [
{
"date": "Wed, Dec 06",
"date_slots": [
]
},
{
"date": "Thu, Dec 07",
"date_slots": [
]
},
{
"date": "Fri, Dec 08",
"date_slots": [
]
},
{
"date": "Sat, Dec 09",
"date_slots": [
]
},
{
"date": "Today",
"date_slots": [
{
"hour": "8",
"hour_slots": [
{
"08:10 AM": "slotId001"
},
{
"08:50 AM": "slotId005"
}
]
},
{
"hour": "3",
"hour_slots": [
{
"03:00 PM": "slotId005"
},
{
"03:30 PM": "slotId007"
}
]
}
]
},
{
"date": "Tomorrow",
"date_slots": [
]
},
{
"date": "Wed, Dec 13",
"date_slots": [
{
"hour": "4",
"hour_slots": [
{
"04:30 PM": "slotId105"
},
{
"04:50 PM": "slotId106"
}
]
},
{
"hour": "5",
"hour_slots": [
{
"05:30 PM": "slotId202"
},
{
"05:45 PM": "slotId208"
}
]
}
]
}
]
};
export default data;
import React, { Component } from 'react';
import data from './data';
import './datepicker.css';
class DatePicker extends Component {
constructor(props){
super(props);
this.state = {
counter:0
};
}
increment(){
if(this.state.counter < 6){
this.setState(prevState => ({counter: prevState.counter + 1}))
}
if(data.available_slots[this.state.counter].data_slots === 0){
return(
<p>No slots available for today</p>
)
}else{
return(
<p>Slots available for today</p>
)
}
}
decrement(){
if(this.state.counter > 0){
this.setState(prevState => ({counter: prevState.counter-1}))
}
if(data.available_slots[this.state.counter].data_slots === 0){
return(
<p>No slots available for today</p>
)
}else{
return(
<p>Slots available for today</p>
)
}
}
render() {
return (
<div>
<div id="center">
<div className="title">
<p>Pick a Date</p>
</div>
<div className="increment">
<button type="button" className="btn btn-success" id="plus" onClick={this.increment.bind(this)}>+</button>
</div>
<div className="display">
<input type="text" id="date" value={data.available_slots[this.state.counter].date}/>
</div>
<div className="decrement">
<button type="button" className="btn btn-danger" id="minus" onClick={this.decrement.bind(this)}>-</button>
</div>
<div className="submit">
<button type="button" class="btn btn-primary" id="submit">Set Date</button>
</div>
</div>
<div id="slotinfo">
</div>
</div>
);
}
}
export default DatePicker;
datepicker.js:
const data = {
"template_type": "slot_picker",
"selection_color": "#000000",
"secondary_color": "#808080",
"title": "Available Slots for Dr. Sumit",
"available_slots": [
{
"date": "Wed, Dec 06",
"date_slots": [
]
},
{
"date": "Thu, Dec 07",
"date_slots": [
]
},
{
"date": "Fri, Dec 08",
"date_slots": [
]
},
{
"date": "Sat, Dec 09",
"date_slots": [
]
},
{
"date": "Today",
"date_slots": [
{
"hour": "8",
"hour_slots": [
{
"08:10 AM": "slotId001"
},
{
"08:50 AM": "slotId005"
}
]
},
{
"hour": "3",
"hour_slots": [
{
"03:00 PM": "slotId005"
},
{
"03:30 PM": "slotId007"
}
]
}
]
},
{
"date": "Tomorrow",
"date_slots": [
]
},
{
"date": "Wed, Dec 13",
"date_slots": [
{
"hour": "4",
"hour_slots": [
{
"04:30 PM": "slotId105"
},
{
"04:50 PM": "slotId106"
}
]
},
{
"hour": "5",
"hour_slots": [
{
"05:30 PM": "slotId202"
},
{
"05:45 PM": "slotId208"
}
]
}
]
}
]
};
export default data;
import React, { Component } from 'react';
import data from './data';
import './datepicker.css';
class DatePicker extends Component {
constructor(props){
super(props);
this.state = {
counter:0
};
}
increment(){
if(this.state.counter < 6){
this.setState(prevState => ({counter: prevState.counter + 1}))
}
if(data.available_slots[this.state.counter].data_slots === 0){
return(
<p>No slots available for today</p>
)
}else{
return(
<p>Slots available for today</p>
)
}
}
decrement(){
if(this.state.counter > 0){
this.setState(prevState => ({counter: prevState.counter-1}))
}
if(data.available_slots[this.state.counter].data_slots === 0){
return(
<p>No slots available for today</p>
)
}else{
return(
<p>Slots available for today</p>
)
}
}
render() {
return (
<div>
<div id="center">
<div className="title">
<p>Pick a Date</p>
</div>
<div className="increment">
<button type="button" className="btn btn-success" id="plus" onClick={this.increment.bind(this)}>+</button>
</div>
<div className="display">
<input type="text" id="date" value={data.available_slots[this.state.counter].date}/>
</div>
<div className="decrement">
<button type="button" className="btn btn-danger" id="minus" onClick={this.decrement.bind(this)}>-</button>
</div>
<div className="submit">
<button type="button" class="btn btn-primary" id="submit">Set Date</button>
</div>
</div>
<div id="slotinfo">
</div>
</div>
);
}
}
export default DatePicker;
import React,{Component}来自'React';
从“./data”导入数据;
导入“./datepicker.css”;
类DatePicker扩展组件{
建造师(道具){
超级(道具);
此.state={
柜台:0
};
}
增量(){
if(this.state.counter<6){
this.setState(prevState=>({counter:prevState.counter+1}))
}
if(data.available\u slots[this.state.counter].data\u slots==0){
返回(
今天没有空位
)
}否则{
返回(
今天有空位
)
}
}
减量{
如果(this.state.counter>0){
this.setState(prevState=>({counter:prevState.counter-1}))
}
if(data.available\u slots[this.state.counter].data\u slots==0){
返回(
今天没有空位
)
}否则{
返回(
今天有空位
)
}
}
render(){
返回(
选择一个日期
+
-
设定日期
);
}
}
导出默认日期选择器;
当我点击当天的加号/减号按钮时,它会显示当天是否有可用的插槽。因此,increment()
和decreation()
函数不会返回输入框之外的
元素
屏幕截图:
const data = {
"template_type": "slot_picker",
"selection_color": "#000000",
"secondary_color": "#808080",
"title": "Available Slots for Dr. Sumit",
"available_slots": [
{
"date": "Wed, Dec 06",
"date_slots": [
]
},
{
"date": "Thu, Dec 07",
"date_slots": [
]
},
{
"date": "Fri, Dec 08",
"date_slots": [
]
},
{
"date": "Sat, Dec 09",
"date_slots": [
]
},
{
"date": "Today",
"date_slots": [
{
"hour": "8",
"hour_slots": [
{
"08:10 AM": "slotId001"
},
{
"08:50 AM": "slotId005"
}
]
},
{
"hour": "3",
"hour_slots": [
{
"03:00 PM": "slotId005"
},
{
"03:30 PM": "slotId007"
}
]
}
]
},
{
"date": "Tomorrow",
"date_slots": [
]
},
{
"date": "Wed, Dec 13",
"date_slots": [
{
"hour": "4",
"hour_slots": [
{
"04:30 PM": "slotId105"
},
{
"04:50 PM": "slotId106"
}
]
},
{
"hour": "5",
"hour_slots": [
{
"05:30 PM": "slotId202"
},
{
"05:45 PM": "slotId208"
}
]
}
]
}
]
};
export default data;
import React, { Component } from 'react';
import data from './data';
import './datepicker.css';
class DatePicker extends Component {
constructor(props){
super(props);
this.state = {
counter:0
};
}
increment(){
if(this.state.counter < 6){
this.setState(prevState => ({counter: prevState.counter + 1}))
}
if(data.available_slots[this.state.counter].data_slots === 0){
return(
<p>No slots available for today</p>
)
}else{
return(
<p>Slots available for today</p>
)
}
}
decrement(){
if(this.state.counter > 0){
this.setState(prevState => ({counter: prevState.counter-1}))
}
if(data.available_slots[this.state.counter].data_slots === 0){
return(
<p>No slots available for today</p>
)
}else{
return(
<p>Slots available for today</p>
)
}
}
render() {
return (
<div>
<div id="center">
<div className="title">
<p>Pick a Date</p>
</div>
<div className="increment">
<button type="button" className="btn btn-success" id="plus" onClick={this.increment.bind(this)}>+</button>
</div>
<div className="display">
<input type="text" id="date" value={data.available_slots[this.state.counter].date}/>
</div>
<div className="decrement">
<button type="button" className="btn btn-danger" id="minus" onClick={this.decrement.bind(this)}>-</button>
</div>
<div className="submit">
<button type="button" class="btn btn-primary" id="submit">Set Date</button>
</div>
</div>
<div id="slotinfo">
</div>
</div>
);
}
}
export default DatePicker;
递增
和递减
函数只是返回元素,不知道在哪里显示它们
根据状态变量this.state.counter
移动逻辑,在render
函数中呈现“今天没有可用插槽”或“今天可用插槽”。可以删除递增
和递减
方法中的逻辑
increment(){
if(this.state.counter < 6){
this.setState(prevState => ({counter: prevState.counter + 1}))
}
}
decrement(){
if(this.state.counter > 0){
this.setState(prevState => ({counter: prevState.counter - 1}))
}
}
increment(){
if(this.state.counter<6){
this.setState(prevState=>({counter:prevState.counter+1}))
}
}
减量{
如果(this.state.counter>0){
this.setState(prevState=>({counter:prevState.counter-1}))
}
}
在渲染函数中
<div id="slotinfo">
{ data.available_slots[this.state.counter].date_slots.length === 0 ?
<p>No slots available for today</p> : <p>Slots available for today</p> }
</div>
{data.available_slots[this.state.counter].date_slots.length==0?
今天没有可用的插槽:今天可用的插槽}
递增
和递减
函数只是返回元素,不知道在哪里显示它们
根据状态变量this.state.counter
移动逻辑,在render
函数中呈现“今天没有可用插槽”或“今天可用插槽”。可以删除递增
和递减
方法中的逻辑
increment(){
if(this.state.counter < 6){
this.setState(prevState => ({counter: prevState.counter + 1}))
}
}
decrement(){
if(this.state.counter > 0){
this.setState(prevState => ({counter: prevState.counter - 1}))
}
}
increment(){
if(this.state.counter<6){
this.setState(prevState=>({counter:prevState.counter+1}))
}
}
减量{
如果(this.state.counter>0){
this.setState(prevState=>({counter:prevState.counter-1}))
}
}
在渲染函数中
<div id="slotinfo">
{ data.available_slots[this.state.counter].date_slots.length === 0 ?
<p>No slots available for today</p> : <p>Slots available for today</p> }
</div>
{data.available_slots[this.state.counter].date_slots.length==0?
今天没有可用的插槽:今天可用的插槽}
它不工作单击加号/减号按钮后显示所有天可用的插槽仅显示今天可用的插槽,即使我单击加号/减号按钮检查此屏幕截图->认为您的意思是条件为数据\u插槽。长度===0
因为数据\u插槽是一个数组。是的,您理解我的问题,但仍然出错看起来像是打字错误<代码>日期槽
,而不是数据槽
。您可以通过在render
函数中(在return
语句上方)记录data.available\u slots[this.state.counter].data\u slots
的值来检查这一点。这将返回未定义的
。它不起作用。单击加号/减号按钮时,它显示所有天可用的插槽。即使我单击加号/减号按钮,也只显示今天可用的插槽。检查此屏幕截图->认为您的意思是数据插槽。长度===0
因为数据插槽
是一个数组。是的你已经理解我的问题,但仍然会出错,看起来像是打字错误<代码>日期槽
,而不是数据槽
。您可以通过在render
函数中(在return
语句上方)记录data.available\u slots[this.state.counter].data\u slots
的值来检查这一点。这将返回未定义的。