Add reference to ExecJS in JavaScript Compression section

rails · Sep 1, 2011 · fdf2f51 · fdf2f51
1 parent 418e321
commit fdf2f51
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/railties/guides/source/asset_pipeline.textile b/railties/guides/source/asset_pipeline.textile
@@ -426,7 +426,7 @@ config.assets.css_compressor = :yui
 
 The +config.assets.compress+ must be set to +true+ to enable CSS compression
 
-h4. JavaScript
+h4. JavaScript Compression
 
 Possible options for JavaScript compression are +:closure+, +:uglifier+ and +:yui+. These require the use of the +closure-compiler+, +uglifier+ or +yui-compressor+ gems respectively.
 
@@ -440,6 +440,8 @@ config.assets.js_compressor = :uglifier
 
 The +config.assets.compress+ must be set to +true+ to enable JavaScript compression
 
+NOTE: You will need a  "ExecJS":https://github.com/sstephenson/execjs#readme - supported runtime in order to use +uglifier+. If you are using Mac OS X or Windows you have a JavaScript engine in your operating system. Check "ExecJS":https://github.com/sstephenson/execjs#readme documentation to know all supported JavaScript runtimes.
+
 h4. Using Your Own Compressor
 
 The compressor config settings for CSS and JavaScript also take any Object. This object must have a +compress+ method that takes a string as the sole argument and it must return a string.