Webpack外部在节点和浏览器中

Question

我有一个同构的React应用程序,它可以在浏览器和服务器上运行.我通过两个不同的入口点和不同的配置运行两个单独的Webpack构建,为两者构建相同的代码.

问题是,在服务器上的节点中运行时,浏览器窗口中存在的外部文件(在此实例中为Google Maps)显然不存在.除入口点文件外,代码完全相同.

index.html的:

// index.html
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key=XXX"></script>

简化配置:

// Server Webpack config
{
    entry: 'server.js',
    target: 'node',
    externals: {
         google: google
    }
}

// Client Webpack config
{
    entry: 'client.js',
    target: 'browser',
    externals: {
         google: google
    }
}

组件:

// The view which builds and runs fine in 
// the client but doesn't run on the server.
var React = require('react'),
    css = require('./style.css'),
    google = require('google'); // Nope, not on the server obviously!

var Component = React.createClass({

    render: function () {
        return (
            <div>
                // Do maps stuff
            </div>
        );
    }

});
module.exports = Component;

我的问题是我该如何处理？

Error: Cannot find module 'google'

我目前有一个我一点也不热衷的解决方案.

// Server Webpack config
{
    entry: 'server.js',
    target: 'node',
    externals: {
         google: google
    },
    plugins: [
        new webpack.DefinePlugin({ 'ENV.browser': false }),
    ]
}

// Client Webpack config
{
    entry: 'client.js',
    target: 'browser',
    externals: {
         google: google
    },
    plugins: [
        new webpack.DefinePlugin({ 'ENV.browser': true }),
    ]
}

// The component
var React = require('react'),
    css = require('./style.css');

if (ENV.browser) {
    var google = require('google');
}

var Component = React.createClass({

    render: function () {
        return (
            <div>
                if (ENV.browser) {
                    // Do maps stuff
                }
            </div>
        );
    }

});
module.exports = Component;

Answer 1

NormalModuleReplacementPlugin根据Dustan Kasten的想法,您可以使用noop替换模块:

{
  plugins: [
    new webpack.NormalModuleReplacementPlugin(/^google$/, 'node-noop'),
  ],
}