Accessing values of elements in RJS?

RJS is just a javascript generator, and the javascript does not get executed until it's client side. Therefore you cannot determine the value of the select option while still in Ruby.

RJS is just a javascript generator, and the javascript does not get executed until it's client side. Therefore you cannot determine the value of the select option while still in Ruby. If you want to do an "if" statement on the selected value you'll need to do it in Javascript.Page.

Thanks a lot for the answer ryanb, for some reason I couldn't find an answer to this in the Rails books and on forums. Actually, I think the difficulty for RJS newbie like me is that the difference is very subtle - yes, RJS is a javascript generator, but why can't it also generate conditionals / etc. For you, converting Ruby into JS? – Vlad Aug 18 '09 at 17:11 This is a limitation of the Ruby language.

The "=" operator is a method and the behavior can be overridden, but "if" behavior cannot. If you are comfortable with javascript then I recommend not using RJS. Instead just mix javascript and erb directly (with a view file like index.js.

Erb). – ryanb Aug 18 '09 at 17:16.

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