javascript - 为什么我有多个 <script> 标签而不是 Rails 应用程序中的一个？

Question

当我在 chrome 上检查我的索引页面时，head 标签有多个标签:

<script src="/assets/components/questions/question_likes.self-6aaf2ce97062977185e0d5f9fc31643ca8fd012bfb53c12752977afdab1260be.js?body=1" data-turbolinks-track="true"></script>
<script src="/assets/components.self-e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855.js?body=1" data-turbolinks-track="true"></script>
<script src="/assets/moment.self-0da3eb4ebf8fb8c3113d89afb90e5b7a87760d21b5b39a405a51fe05c8e40fd8.js?body=1" data-turbolinks-track="true"></script>
<script src="/assets/jquery-fileupload/vendor/jquery.ui.widget.self-92c37a41e67e528eecf100716907331b4b9aa4f546bf75ef2e0529c8c03a562d.js?body=1" data-turbolinks-track="true"></script>
<script src="/assets/jquery-fileupload/jquery.iframe-transport.self-e461f7ff2a60ee89459106a6f3e349cf79b7f56066b3c8cbc73389b30e1eb592.js?body=1" data-turbolinks-track="true"></script>
<script src="/assets/jquery-fileupload/jquery.fileupload.self-79c952fc273d5a8955a6093f4f489dcd509c5a2cefb2b9a049d3cdb2710ec8d3.js?body=1" data-turbolinks-track="true"></script>
<script src="/assets/jquery-fileupload/basic.self-6a3cf5192354f71615ac51034b3e97c20eda99643fcaf5bbe6d41ad59bd12167.js?body=1" data-turbolinks-track="true"></script>
<script src="/assets/jquery-fileupload/vendor/tmpl.self-c2108a63ad9ae9ab4a723bcf0104f6a92a63eb917331ff69fad6f02fe7219488.js?body=1" data-turbolinks-track="true"></script>
<script src="/assets/s3_direct_upload.self-a71af1e40427c6623d982df253581eb58013b84d84f45bcef7d0352ad4e82534.js?body=1" data-turbolinks-track="true"></script>
<script src="/assets/application.self-c88a422e522d3887e663830741eb19213b74b0bcee8413fffde6decde58266aa.js?body=1" data-turbolinks-track="true"></script>

我以为 rails 将所有 js 文件连接成一个文件，为什么会这样？我正在使用 React，没有 turbolinks。

Answer 1

在生产环境中运行时，Rails 将创建一个缩小的 javascript 文件，您可以使用 javascript_include_tag 引用该文件。但是在开发和测试环境中，所有 JavasScript 文件都将包含在其中，如您所示，以便于调试。

您可以 read more about the Rails asset pipeline in development mode在官方指南中。

In development mode, assets are served as separate files in the order they are specified in the manifest file.

This manifest app/assets/javascripts/application.js:

//= require core
//= require projects
//= require tickets

would generate this HTML:

<script src="/assets/core.js?body=1"></script>
<script src="/assets/projects.js?body=1"></script>
<script src="/assets/tickets.js?body=1"></script>

指南还包括 section discussing the config.assets.debug option ，这就是本例中的问题(感谢@SergioTulentsev)。