在 Webpack 中加载静态 JSON 文件 [英] Load static JSON file in Webpack

问题描述

我的代码中有以下构造:

I have somewhere in my code following construction:

var getMenu = function () {
    return window.fetch("portal/content/json/menu.json").then(function (data) {
        return data.json();
    });
};

我在我的 webpack.config.js 中尝试过:

I tried in my webpack.config.js this:

module: {
    loaders: [
        ...
        {
            test: /\.json$/,
            exclude: /node_modules/,
            use: [
                'file-loader?name=[name].[ext]&outputPath=portal/content/json'
            ]
        },
        ...
   ]
}

项目结构:

dist
  content
     json
        menu.json <- this is missing

src
  content
     json
       menu.json <- source file

问题:

webpack 如何将 src/content/json/menu.json 复制到 dist/content/json/menu.json ?

How can webpack copy src/content/json/menu.json to dist/content/json/menu.json ?

推荐答案

您正在使用 fetch 来请求 JSON 文件，这只会在运行时发生.此外，webpack 只处理导入的任何内容.您希望它处理函数的参数，但如果 webpack 这样做，函数的每个参数都将被视为模块，这会破坏该函数的任何其他用途.

You're using fetch to request a JSON file and that will only happen at runtime. Furthermore, webpack only processes anything that is imported. You expected it to handle an argument to a function, but if webpack did that, every argument to a function would be considered a module and that breaks any other use for that function.

如果你想让你的加载器启动，你可以导入文件.

If you want your loaders to kick in, you can import the file.

import './portal/content/json/menu.json';

您还可以导入 JSON 并直接使用它，而不是在运行时获取它.Webpack 2 默认为所有 json-loader>.json 文件.您应该删除 .json 规则，然后按如下方式导入 JSON.

You can also import the JSON and use it directly instead of fetching it a runtime. Webpack 2 uses json-loader by default for all .json files. You should remove the .json rule and you would import the JSON as follows.

import menu from './portal/content/json/menu.json';

menu 与您从 getMenu 函数中获得的 JavaScript 对象相同.

menu is the same JavaScript object that you would get from your getMenu function.

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