如何使用SystemJS指定库依赖项? [英] How can I specify library dependencies using SystemJS?

问题描述

使用 SystemJS ，如何指定一个库依赖另一个库?例如， Bootstrap JavaScript库取决于 SytemJS文档，我假设我将使用System.config.meta属性指定此依赖项:

Using SystemJS, how do I specify that one library depends on another? For example, the Bootstrap JavaScript library depends on jQuery. Based on the SytemJS docs, I assumed I would specify this dependency using System.config.meta property:

System.config({
    baseUrl: './scripts',
    defaultJSExtensions: true,
    map: {
        jquery: './lib/jquery-2.2.0.min.js',
        bootstrap: './lib/bootstrap.min.js'
    },
    meta: {
        bootstrap: {
            deps: ['jquery']
        }
    }
});
System.import('./scripts/app.js');

但这似乎没有效果.当我运行应用程序时，Bootstrap库会引发Bootstrap's JavaScript requires jQuery错误-这意味着Bootstrap在jQuery之前被加载.

But this seems to have no effect. When I run my application, the Bootstrap library throws a Bootstrap's JavaScript requires jQuery error - which means Bootstrap is being loaded before jQuery.

如何确保始终在Bootstrap之前加载jQuery?

How can I ensure that jQuery is always loaded before Bootstrap?

推荐答案

盲目更改之后，我遇到了一个似乎有效的配置.这是我的配置:

After blindly changing things, I happened upon a configuration that seems to work. Here's my config:

System.config({
    defaultJSExtensions: true,
    paths: {
        jquery: './scripts/lib/jquery-2.2.0.min.js',
        bootstrap: './scripts/lib/bootstrap.min.js'
    },
    meta: {
        bootstrap: {
            deps: ['jquery']
        }
    }
});

System.import('./scripts/app.js');

我认为密钥正在从map更改为paths.

I think the key was changing from map to paths.

编辑

旁注:在学习了有关SystemJS的更多知识之后，我发现 容易得多，而

Side note: after learning a bit more about SystemJS, I'm discovering that it is much easier to let jspm do the hard work of managing my SystemJS configuration.

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