Can't add ruby code to jquery

Question

When I add my rails code into my jquery I have this problem:

Uncaught SyntaxError: Unexpected token <

Here my controller:

class WelcomeController < ApplicationController
    def index
        @a = "12345"
    end
end

My index.js

jQuery(function($) {
    $(document).ready(function($) {
        var a = <%= @a %>
        var url = "http://www.google.com"
        console.log(a)
    }); 
});

I don't know how to fix that, please help me!

Your `index.js` file isn't rendered by `erb`. Put it in your views in `index.js.erb` instead and create appropriate action for it. — Marek Lipka, Apr 13 '15 at 08:47
when I change index.js to index.js.erb, I have new error :Uncaught SyntaxError: Unexpected token var — Dung Nguyen quang, Apr 13 '15 at 08:56
missing `;` in your js code. I suggest you read something about javascripts syntax — Roman Kiselenko, Apr 13 '15 at 09:05

score 2 · Accepted Answer · answered Apr 13 '15 at 09:32

Change the filename to index.js.erb so that rails understands that you want to insert ruby code inside your javascript.

Also fix your javascript code:

jQuery(function($) {
    $(document).ready(function($) {
        var a = "<%= @a %>";
        var url = "http://www.google.com";
        console.log(a);
    }); 
});

Can't add ruby code to jquery

1 Answers1