Question

我正在使用yarn将webpack设置为我的react项目，并且出现此错误：

./src/app.js中的
ERROR 67：6模块解析失败：意外的令牌（67：6）您可能需要适当的加载程序来处理此文件类型，当前没有配置任何加载程序来处理此文件。看到 https://webpack.js.org/concepts#loaders ｢wdm｣：编译失败。

webpack.config.js

const path = require("path");

module.exports = {
    entry: "./src/app.js",
    output: {
        path: path.join(__dirname, 'public'),
        filename: 'bundle.js'
    },
    module:{
        rules:[{
            loader: 'babel-loader',
            test: '/\.(js|jsx)$/',
            exclude: /node_modules/
        }]
    },
    devtool: 'cheap-module-eval-source-map',
    devServer: {
        contentBase: path.join(__dirname, 'public')
    }
}

.babelrc
{
    "presets": ["env", "react","@babel/preset-env"],
    "plugins": [
        "transform-class-properties"
    ]
}

package.json

{
  "name": "react",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "scripts": {
    "serve": "live-server public/",
    "build": "webpack",
    "dev-server": "webpack-dev-server"
  },
  "dependencies": {
    "babel-cli": "6.24.1",
    "babel-core": "6.25.0",
    "babel-plugin-transform-class-properties": "6.24.1",
    "babel-preset-env": "1.5.2",
    "babel-preset-react": "6.24.1",
    "live-server": "^1.2.1",
    "react": "^16.9.0",
    "react-dom": "^16.9.0",
    "webpack": "^4.39.3",
    "webpack-dev-server": "^3.8.0"
  },
  "devDependencies": {
    "@babel/core": "^7.6.0",
    "babel-loader": "^8.0.6",
    "webpack-cli": "^3.3.8"
  }
}

Answer 1

您正在使用不必要的转义符：这不是必需的。

替换 test: '/\.(js|jsx)$/', 替换为 test: /\.js$|jsx/,，应该可以正常工作。

我在您的计算机中复制了您的问题，并发现上述问题已解决。

希望这会有所帮助，编写愉快的代码！

Answer 2

所选答案缺少一些详细信息：

应该 test: '/\.(js|jsx)$/'，替换为 test: /\.js|\.jsx$/

\: is an escape character在这种情况下为.

|: is an Alternation / OR operand

$: is end of line

希望这对您有用。

来源： https://www.rexegg.com/regex-quickstart.html

Answer 3

将.babelrc文件添加到node_modules文件夹所在的文件夹中，内容如下：

{
  "presets": ["@babel/preset-react"]
}

Answer 4

这个错误发生在我身上，仅仅是因为文件被放置在项目的父文件夹中（即位于项目文件夹之外）。

将文件移动到固定的文件夹中。

Answer 5

将下面提到的代码放在webpack文件中

mix.extend(
    "graphql",
    new (class {
        dependencies() {
            return ["graphql", "graphql-tag"];
        }

        webpackRules() {
            return {
                test: /\.(graphql|gql)$/,
                exclude: /node_modules/,
                loader: "graphql-tag/loader"
            };
        }
    })()
);


mix.js("resources/js/app.js", "public/js").vue();

mix.graphql();

Answer 6

web Failed to compile.
<PATH>/KeyboardAwareHOC.js 13:12
Module parse failed: Unexpected token (13:12)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders 3
| } from ‘react-native’
| import { isIphoneX } from ‘react-native-iphone-x-helper’

import type { KeyboardAwareInterface } from ‘./KeyboardAwareInterface’
|
| const _KAM_DEFAULT_TAB_BAR_HEIGHT: number = isIphoneX() ? 83 : 49

安装以下软件包，然后重新启动expo软件包。

https://www.npmjs.com/package/@codler/react-native-keyboard-aware-scroll-view

您可能需要适当的加载程序来处理此文件类型，当前没有配置任何加载程序来处理此文件。”

6 个答案: