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Add reference to ExecJS in JavaScript Compression section

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1 parent 418e321 commit fdf2f519bd948003b851a1eff8a6f157297a46ad @guilleiguaran guilleiguaran committed Sep 1, 2011
Showing with 3 additions and 1 deletion.
  1. +3 −1 railties/guides/source/asset_pipeline.textile
4 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": - 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": 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.

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