Answers

• kthorngren Posts: 21,545Questions: 26Answers: 4,988

  September 2020

  There are some problems with your test case. First you are getting this error in the console:

  Uncaught ReferenceError: jQuery is not defined

  I added the jquery.js include.

  Now its getting this error:

  Uncaught ReferenceError: data is not defined

  I commented out the data:data, option since there is table data.

  Now this alert message occurs:

  DataTables warning: table id=nr - Requested unknown parameter '3' for row 0, column 3. For more information about this error, please see http://datatables.net/tn/4

  Thats causing your column data to have $NaN. Please fix the test case to represent your data correctly before we help with the footerCallback.

  Here is the updated example:
  http://live.datatables.net/morayuvu/19/edit

  Kevin
• giulichajari Posts: 19Questions: 8Answers: 0

  September 2020

  Obviously, it can't find the values of the data, because it hasnt the JSON File.
  live.datatables.net/morayuvu/21/edit
  Now i replace the columns declaration. And it works perfectly, but in my application it goes on showing NaN!
• kthorngren Posts: 21,545Questions: 26Answers: 4,988

  September 2020

  Obviously, it can't find the values of the data, because it hasnt the JSON File.

  Understood. Take an example of your JSON data and use data: data to add it to the table. See this example.

  Kevin
• giulichajari Posts: 19Questions: 8Answers: 0

  September 2020

  ok.here you are:
  live.datatables.net/morayuvu/22/edit

  But now it seems to be counting the number of record, not the content.
• kthorngren Posts: 21,545Questions: 26Answers: 4,988

  September 2020

  But now it seems to be counting the number of record, not the content.

  You are totaling column 5 which each cell has 1. So it would look like its counting instead of summing. I updated one of your column 5 values to 2 and now the total is 5.
  http://live.datatables.net/morayuvu/24/edit

  Kevin
• giulichajari Posts: 19Questions: 8Answers: 0

  September 2020

  Because the columns definition remains. live.datatables.net/morayuvu/25/edit

  so data appears in whatever place. Now i input the datatable columns, but it goes on the same way
• kthorngren Posts: 21,545Questions: 26Answers: 4,988

  September 2020

  See this [thread]https://datatables.net/forums/discussion/comment/165783/#Comment_165783) to learn how to calculate columns that are using columns.render.

  Kevin