与webpack捆绑在一起的Javascript无法正常工作

时间:2018-10-29 18:33:30

标签: javascript webpack

因此,将bundle.js链接到index.html之后,基本上我无法使用任何JavaScript。即使正在加载bundle.js,每个函数都未定义,我可以在开发工具中通过源代码访问它。但是,如果我直接链接我的JavaScript文件“ app.js”,那么一切都会按预期进行。我认为我的webpack设置很可能会出现问题,因为这是我第一次进行设置。关于此webpack.config的其他任何提示,我都会很高兴。在此先感谢:)

这是我的package.json:

{
"name": "name",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"build": "webpack --mode production",
"dev": "webpack --mode development",
"devs": "webpack-dev-server --mode development"
},
"author": "",
"license": "ISC",
"devDependencies": {
"css-loader": "^1.0.0",
"extract-loader": "^3.0.0",
"file-loader": "^2.0.0",
"font-awesome": "^4.7.0",
"html-loader": "^0.5.5",
"html-webpack-plugin": "^3.2.0",
"mini-css-extract-plugin": "^0.4.4",
"node-sass": "^4.9.4",
"sass-loader": "^7.1.0",
"style-loader": "^0.23.1",
"webpack": "^4.23.1",
"webpack-cli": "^3.1.2",
"webpack-dev-server": "^3.1.10"
}
}

webpack.config.js:

const path = require("path");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
module.exports = {
entry: {
    main: ["./src/index.js"]
},
output: {
    filename: "scripts/bundle.js",
    path: path.resolve(__dirname, "./dist")
},
module: {
    rules: [
        {
            test: /\.html$/,
            use: [
                {
                    loader: "file-loader",
                    options: {
                        name: "[name].html"
                    }
                },
                {
                    loader: "extract-loader"
                },
                {
                    loader: "html-loader",
                    options: {
                        attrs: ["img:src"]
                    }
                }
            ]
        },
        {
            test: /\.sass$/,
            use: [MiniCssExtractPlugin.loader, "css-loader", "sass-loader"]
        },
        {
            test: /\.(jpg|gif|png)$/,
            use: [
                {
                    loader: "file-loader",
                    options: {
                        name: "images/[name].[ext]"
                    }
                }
            ]
        }
    ]
},
plugins: [
    new MiniCssExtractPlugin({
        filename: "styles/[name].css",
        chunkFilename: "[id].css"
      })
],
watch: true,
};

Webpack主条目index.js:

require('./scripts/app.js');
require('./styles/sass/app.sass');
require("./index.html");

index.html脚本链接:

<script src="./scripts/app.js"></script>

编辑问题肯定在正在生成的bundle.js中。如果我在bundle.js的开头复制函数,那么一切都会按预期进行。这是小提琴中的bundle.js代码:

https://jsfiddle.net/ustqkg7v/

如果我在bundle.js的开头从app.js复制函数,那么一切都会按预期进行。我认为范围可能存在问题,但我不确定。

编辑2 我已经设置了具有相同文件夹结构,文件等的较小项目。完全相同的问题。这是链接:

https://www.dropbox.com/s/9f5pf6y4fbb60dw/webpack4-test.rar?dl=0

2 个答案:

答案 0 :(得分:0)

这个问题也可能是由于path: path.resolve(__dirname, "./dist")造成的。我假设webpack.config.js位于项目的根目录下,所以我认为它必须是路径:path.resolve(__dirname, "dist")

然后在html中需要从dist文件夹中引用

<script src="./dist/app.js"></script>

在进行此检查之前,是否在dist文件夹中生成了app.js

答案 1 :(得分:-1)

在“ webpack.config.js”文件上添加:

devServer: 
{
     contentBase: path.resolve(__dirname, 'dist'),
     writeToDisk: true,
}