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When I get minified version of Bootstrap v3.2.0. to me it seems like it’s commented, but it is working, what kind of comments are those, how browser understands it:

* Bootstrap v3.3.6 (
* Copyright 2011-2016 Twitter, Inc.
* Licensed under MIT (
*//*! normalize.css v3.0.3 | MIT License |      */html{font-fami

Look here



  1. The slash asterisk, /*, opens a multi-line comment and */ closes multi-line comments. You can see right before the CSS starts the comment is closed by the */.

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  2. Further, the /*! preserves the comment through the minify process.

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