Question

我有一个react-select组件，我定义如下：

<Select
            id="portf"
            options={opts}
            onChange={value => portfolioSelector(value)}
            placeholder="Select Portfolio"
          />

opts = [{label: any, value:1}, {label:Two, value:2}]。

选择的值通过portfolioSelector函数存储在状态中。问题是，当我选择一个值时，它不会显示在选择字段中。我的主要内容是：

const PortfolioSelector = ({
  opts,
  portfolioSelector
}) => {
  if (opts) {
    return (
      <div className="portfolio select-box">
        <label htmlFor="selectBox" className="select-box__label">
        Portfolio
        </label>
        <div className="select-box__container">
          <Select
            id="portf"
            options={opts}
            onChange={value => portfolioSelector(value)}
            placeholder="Select Portfolio"
          />
        </div>
        <div className="separator" />
      </div>
    );
  }
  return (
    <div>Loading</div>
  );
};

你知道为什么吗？

Answer 1

for (i in 1:nrow(Calendar)){

 Calendar$'HourSpent' <- ifelse(Calendar$Week == Test$Group.1, 
 (Calendar$Hours/Test$x)*0.79, 
 0)

}

value 属性需要形状数组。

Answer 2

首先是你创建了错误的数组，如果标签：any或Two是字符串，你必须添加双引号。看看这个：

opts = [{label: "any", value:1}, {label:"Two", value:2}]

第二，你必须记住在这种情况下的选项是opts是一个具有标签和值的对象数组，你想要添加到你的状态的数据是什么？

      <Select
        id="portf"
        options={opts}
        onChange={value => portfolioSelector(value.value /* or if you want to add label*/ value.label)}
        placeholder="Select Portfolio"
      />

Answer 3

这是我使用的替代解决方案。

演示：https://codesandbox.io/s/github/mkaya95/React-Select_Set_Value_Example

import React, { useState } from "react";
import Select from "react-select";

export default function App() {
  const [selectedOption, setSelectedOption] = useState("none");
  const options = [
    { value: "none", label: "Empty" },
    { value: "left", label: "Open Left" },
    { value: "right", label: "Open Right" },
    {
      value: "tilt,left",
      label: "Tilf and Open Left"
    },
    {
      value: "tilt,right",
      label: "Tilf and Open Right"
    }
  ];
  const handleTypeSelect = e => {
    setSelectedOption(e.value);
  };

  return (
    <div>
      <Select
        options={options}
        onChange={handleTypeSelect}
        value={options.filter(function(option) {
          return option.value === selectedOption;
        })}
        label="Single select"
      />
    </div>
  );
}

Answer 4

I fixed it. 你忘记了增值属性。使用它，检查工作代码：

const opts = [{ label: 'any', value: 1 }, { label: 'Two', value: 2 }];

const PortfolioSelector = ({ options }) => {
  if (options) {
    return (
      <div className="portfolio select-box">
        <label htmlFor="selectBox" className="select-box__label">
          Portfolio
        </label>
        <div className="select-box__container">
          <Select
            id="portf"
            options={options}
            value={this.state.opts1}
            onChange={value => this.setState({ opts1: value })}
            placeholder="Select Portfolio" />
        </div>
        <div className="separator" />
      </div>
    );
  }
  return <div>Loading</div>;
};

并调用您的组件

<PortfolioSelector options={opts} />

Answer 5

这是我的解决方案

演示：https://codesandbox.io/s/prod-rgb-o5svh?file=/src/App.js

代码：

import axios from 'axios'
import {useEffect, useState} from 'react'
import Select from 'react-select'
import "./styles.css";

export default function App() {
  const [users, setUsers] = useState()
  const [userId, setUserId] = useState()

  useEffect(()=>{
    const getUsers = async () => {
      const {data} = await axios.get('https://jsonplaceholder.typicode.com/users')
      setUsers(data)
    }
    getUsers()
  },[])
const options = users && users.map(user =>{
  return {label: user.name, value: user.id}
})
console.log(userId)
  return (
    <div className="App">
     {users && (
       <Select 
       placeholder='Select user...'
       isSearchable
       value={options.label}
       options={options}
       onChange={(option) => setUserId(option.value) }
       />
     )}
    </div>
  )
}

Answer 6

您可以简单地将 value 属性设为 Selected.label

value={selectedOption.label}

Answer 7

opts = [{label: any, value:1}, {label:Two, value:2}]

值必须是字符串。

React-select不会在字段

7 个答案: