![](/img/trans.png)
[英]How to add a piece of text after a div? ( React-js, Bootstrap)
[英]How to bind checkbox value with text input in dynamic form with react-js?
我在react-js中有一個動態表單,我的一些元素是復選框/單選框,其中一個具有綁定到其上的文本輸入。
例如,問題是:您最喜歡的顏色是什么?
答案是:
- red
- blue
- green
- OTHER
和OTHER答案前面有一個文本輸入,供用戶在其中鍵入自己的自定義答案。 如何將復選框/收音機綁定到相關的輸入文本並獲取其值? 形成
如果您使用較新版本的React,請嘗試使用狀態掛鈎。 遵循以下原則
import React, { useState } from 'react';
function Example() {
const [color, setColor] = useState('');
return (
<div>
<select value={color}
onChange={(e) => setColor(value)}>
{ ['red', 'blue', 'green', 'OTHER'].map((c) => <option key={c} value={c}>{c}</option>)}
</select>
{color === 'OTHER' && <input type="text"></input>}
</div>
);
}
使用Material UI,我使用了類似的解決方案來添加可填充的“其他”復選框:
import React from "react";
import ReactDOM from "react-dom";
import FormGroup from "@material-ui/core/FormGroup";
import FormControlLabel from "@material-ui/core/FormControlLabel";
import Checkbox from "@material-ui/core/Checkbox";
import TextField from "@material-ui/core/TextField";
import "./styles.css";
class App extends React.Component {
constructor() {
super();
this.state = {
options: ["red", "blue", "green", "other"],
filterOptions: ["red", "blue", "green"],
checkedValues: [],
otherValue: "other"
};
}
handleOther = () => event => {
let value = event.target.value;
this.setState({
otherValue: value
});
};
handleSaveOther = () => event => {
let newCheckedValues = [...this.state.checkedValues]; // make a separate copy of the array
let intersection = newCheckedValues.filter(x =>
this.state.filterOptions.includes(x)
);
let allValues = [...intersection, this.state.otherValue];
if (this.state.other) {
this.setState({
checkedValues: allValues
});
}
};
handleCheck = option => event => {
let value = event.target.value;
let checked = event.target.checked;
let newCheckedValues = [...this.state.checkedValues]; // make a separate copy of the array
let index = newCheckedValues.indexOf(value);
if (index !== -1) {
newCheckedValues.splice(index, 1);
this.setState({
checkedValues: newCheckedValues,
[option]: checked
});
} else {
this.setState({
checkedValues: [...this.state.checkedValues, value],
[option]: checked
});
}
};
render() {
const { options, checkedValues, otherValue } = this.state;
console.log(checkedValues);
return (
<div className="App">
<div style={{ width: "50%", margin: "0 auto" }}>
<FormGroup>
{options.map((option, i) => {
return (
<FormControlLabel
control={
<Checkbox
onChange={this.handleCheck(option)}
value={option === "other" ? otherValue : option}
color={"primary"}
/>
}
label={
option === "other" ? (
<TextField
id={"other"}
name={"other"}
value={this.state.otherValue}
fullWidth
onChange={this.handleOther()}
onBlur={this.handleSaveOther()}
/>
) : (
option
)
}
/>
);
})}
</FormGroup>
</div>
</div>
);
}
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.