Question

我正在尝试向我的应用程序添加一个下拉菜单，然后我选择了Selectize（https://github.com/furqanZafar/react-selectize）。但它似乎无法在页面上正确显示。 This is what is looks like，似乎缺少css样式。我是React的新秀，所以如果这不是一个聪明的问题，请耐心等待。提前谢谢！

webpack.config.js

var path = require("path")
var webpack = require('webpack')
var BundleTracker = require('webpack-bundle-tracker')

module.exports = {
  context: __dirname,

  entry: './assets/js/index', 

  output: {
      path: path.resolve('./assets/bundles/'),
      filename: "[name]-[hash].js",
  },

  plugins: [
    new BundleTracker({filename: './webpack-stats.json'}),
  ],

  module: {
    loaders: [
      {test: /\.jsx?$/, exclude: /node_modules/, loader: 'babel-loader', query: { presets:['react'] }}, 
      {test: /\.css$/, loader: 'style-loader'},
      {test: /\.css$/, loader: 'css-loader', query: { modules: true, localIdentName: '[name]__[local]'}},
    ],
  },

  resolve: {
    modulesDirectories: ['node_modules', 'bower_components'],
    extensions: ['', '.js', '.jsx']
  },
}

Dropdown.js

import {ReactSelectize, SimpleSelect, MultiSelect} from 'react-selectize';
import React from 'react';
import 'react-selectize/themes/index.css'


export default class Dropdown extends React.Component {
    render() {
        return (
            <SimpleSelect placeholder="Select a fruit" onValueChange={value => alert(value)}>
                <option value = "apple">apple</option>
                <option value = "mango">mango</option>
                <option value = "orange">orange</option>
                <option value = "banana">banana</option>
            </SimpleSelect>
        )
    }
}

index.js

import Dropdown from "./components/dropdown"

var React = require('react')
var ReactDOM = require('react-dom')

ReactDOM.render(<Dropdown />, document.getElementById('container'))

控制台中出现以下错误：

Uncaught Error: addComponentAsRefTo(...): Only a ReactOwner can have 
refs. You might be adding a ref to a component that was not created 
inside a component's `render` method, or you have multiple copies of 
React loaded

Answer 1

对于许多反应组件，相关的CSS包含在npm模块中，但不能通过import加载，因为它们不是JS。通常必须单独加载样式。

文档说：

要包含默认样式，请将以下import语句添加到＆gt;手写笔文件：@import'node_modules / react-selectize / themes / index.css'

你包含了吗？如果你没有使用Stylus，你可以抓住css并将其粘贴到主CSS文件中。

React不呈现css样式

1 个答案: