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• 如何在铁路中获取字母变量
原标题:how to access javascript variable in rails view

Is there any way to access javasript variable inside the rails view. I just set some value of javascript variable and want to access it in rails view.

增 编

问题回答

你们必须理解,你的看法中的废墟代码在服务器上执行,而网页上的任何 j印都有待执行。

因此,你不能这样做:

<script>
  var js_var = 1;
</script>

<%= get_value_of_js_var_somehow %>

其另一轮工作是:

<script>
  var js_var = <% generate_value_with_ruby %>;
  do_something_in_javascript_with_js_var();
</script>

你们可以向使用AJAX的铁路通过ava形。 举例来说,如果你想将用户的补贴通过到铁路控制器的一种方法中,你就可以执行以下守则:

<script>
  var id = 1;
  <%= remote_function :url => {:controller=> controller_name , :action=> method_name }, :with => " user_id=  + id" %>
</script>

你们将通过作为参数的《组织社会责任倡议》申请获得变量。 用户_id]。

def method_name
  if params[:user_id].exists?
    u = User.where( id = ? , params[:user_id]).first
  end
  puts u.path
end

我希望我回答了你的问题。

如果你在较高部分的javascript(本身:申请)中能够变数,那么你总是能够从这个角度看待。

#application.js
var someVar = "Hello World";

然后,在你看来(对客户执行),你可以......

<script type= text/javascript >
  alert(someVar);
</script>

我认为,如果这3个员额中有一个没有回答你的问题,我们需要更具体的阐述。

我们有以下文字:

<script type="text/javascript">
  var a="some value";
  document.getElementById( tagid ).innerHTML= <%= tag(:div,content_tag(:p,  " +a+ "  ), :id=>  " +a+ "  , name=>"somename") %> ;
</script>




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