How to use variable in javascript escape_javascript rails?

Question

I need to pass a variable js to rails, as a parameter, but it is not working. Here is my code:

#function js
function load_custom_fields(){
  var id = $("MY_SELECT").val();
  $(".productHere").html("<%= escape_javascript(render :partial =>'my_partial', :locals => { id:id} ) %>");

}

Answer 1

From

"<%= escape_javascript(render :partial =>'my_partial', :locals => { id:id} ) %>"

To

"<%= escape_javascript(render :partial =>'my_partial', :locals => { id:"+id+"} ) %>"

Answer 2

You can use JS-interpolation. For this use backticks and ${var} :

`<%= escape_javascript(render partial: 'my_partial', locals: { id: ${id} }) %>`

Answer 3

A simple solution is to add a placeholder inside the escape_javascript and then replace it with your JavaScript variable, for example:

var id = $("MY_SELECT").val();
$(".productHere").html("<%= escape_javascript(render :partial =>'my_partial', :locals => { id: '_ID_'} ) %>".replace("_ID_", id);