Question

我尝试运行我的应用程序，但是在控制台中没有任何内容，在窗口中也没有任何内容，我试图添加<script src="target/app.js"></script>，但会出错Cannot GET /target/app.js。我也在搜索create-react-app的工作方式，因为它不使用任何带有html文件中的脚本的脚本，但无济于事

这是webpack.config.js。但是我不认为webpack有问题。还是devServer可能有问题？

const path = require('path')
const webpack = require('webpack')

module.exports = {
    entry: {
        app: ['@babel/polyfill', './src/index.js']
    },
    module: {
        rules: [
            {
                test: /\.scss$/,
                use: ['style-loader', 'css-loader', 'sass-loader']
            },
            {
                test: /\.(js|jsx)?$/,
                include: /node_modules/,
                use: ['react-hot-loader/webpack'],
            },
            {
                test: /\.(js|jsx)$/,
                exclude: /node_modules/,
                include: path.join(__dirname, 'src'),
                loader: require.resolve('babel-loader'),
            },
            {
                test: /\.(js|jsx)$/,
                loader: 'prettier-loader',
                exclude: /node_modules/,
                options: require('./prettier.config')
            },
            {
                test: /\.(jpe?g|png|gif)$/,
                use: [{
                    /* inline if smaller than 10 KB, otherwise load as a file */
                    loader: 'url-loader',
                    options: {
                        limit: 10000
                    }
                }]
            },
            {
                test: /\.(eot|svg|ttf|woff2?|otf)$/,
                use: 'file-loader'
            }
        ]
    },
    resolve: {
        extensions: ['*', '.js', '.jsx', '.css', 'scss']
    },
    output: {
        path: path.resolve(__dirname, '/target/'),
        filename: '[name].js',
        chunkFilename: '[name].chunk.js',
        publicPath: '/public/'
    },
    plugins: [
        new webpack.ProvidePlugin({
            R: 'ramda'
        })
    ],
    devServer: {
        contentBase: path.join(__dirname, '/public'),
        port: 3131
    }
}

这是src/index.js。在这个地方，我看不到任何错误，并且一切正常。

import React from 'react'
import {render} from 'react-dom'
const App = () => (
    <div>
        <h1>Hello world!!</h1>
    </div>
)
render(<App />, document.getElementById('root'))

<!DOCTYPE html>
<html lang=”en”>
<head>
    <meta charset=”UTF-8">
    <meta name=”viewport” content=”width=device-width, initial-scale=1.0">
    <title>React</title>
</head>
<body>
<div id=”root”></div>
</body>
</html>

Answer 1

该问题似乎是webpack配置问题，请检查此修复程序是否有效。

dataset = dataset.prefetch(buffer_size=batch_size)
dataset = dataset.shuffle()
dataset = dataset.repeat(1)
dataset = dataset.map(parse samples)
dataset = dataset.filter(my predicate on each samples)
dataset = dataset.batch()
dataset = dataset.prefetch(buffer_size=tf.contrib.data.AUTOTUNE)

Answer 2

尝试添加斜杠-let myRect = UIView(frame: CGRect(x: 0, y: 0, width: 200, height: 50)) myRect.roundCorners(corners: [.topRight, .topLeft])

ReactJS无法渲染到div

2 个答案: