Question

I am working on one script which has been called from the websocket . This page of code is of html.erb

It pass variable to the javascript, and from that javascript variable i want to assign it to ruby variable ,

Here is the code

function set_color(val1,val2)
{

  <%background_color_id = %>
  var obj_color_id = '<%=background_color_id ='+val2+'%>' ;
  console.log(obj_color_id)
 }

The result from console log is +val2+

If I pass var obj_color_id = '<%=background_color_id ='val2'%>' ;

The result from console log is val2

Please help me assign javascript variable to ruby variable

Answer 1

Actually, if I understand your code (your question is not well phrased, unfortunately), the simple solution is:

1- Assign a value via server-side code:

function set_color(val1,val2)
{
  var bkgdColorId = "<%= background_color_id %>";
  var obj_color_id = bkgdColorId;
  console.log(obj_color_id)
}

2- (Or,) Assign a value from client-side code:

function set_color(val1,val2)
{
  /** pseudo-code **/
  on-click-event: makeAjaxCallToServer(){
    urlForWebService, { color: val2 }
  }
}

Using some jQuery (if assigning to server from client-side event) would greatly facilitate this process.