Using counter with nth type

Is it possible to have a counter with nth-type something like this:

td:nth-of-type(counter(section)):before { 
     content: "Date"counter(section); 
     counter-increment: section;
}

Where counter is initialized as

#myTable  tr { 
    border: 1px solid #ccc; 
    counter-reset: section;counter-increment: section;
}

What I'm trying to do is this - check if tr has class iR and if it does, the structure looks like this:

table.myTable td:nth-of-type(1):before { content: "Date"; }
table.myTable td:nth-of-type(2):before { content: "Fajr"; }
table.myTable td:nth-of-type(3):before { content: "Fr"; }
table.myTable td :nth-of-type(4):before { content: "Se"; }
table.myTable td:nth-of-type(5):before { content: "Dr"; }
table.myTable td:nth-of-type(6):before { content: " "; }
table.myTable td:nth-of-type(7):before { content: "A"; }
table.myTable td:nth-of-type(8):before { content: " "; }
table.myTable td:nth-of-type(9):before { content: "Mb"; }
table.myTable td:nth-of-type(10):before { content: " "; }
table.myTable td:nth-of-type(11):before { content: "I"; }
table.myTable td:nth-of-type(12):before { content: ""; }

If not it will be like this

table.myTable td:nth-of-type(1):before { content: "Date"; }
table.myTable td:nth-of-type(2):before { content: "Fr"; }
table.myTable td :nth-of-type(3):before { content: "Se"; }
table.myTable td:nth-of-type(4):before { content: "Dr"; }
table.myTable td:nth-of-type(5):before { content: "A"; }
table.myTable td:nth-of-type(6):before { content: "Mb"; }
table.myTable td:nth-of-type(7):before { content: "I"; }

Here is jsfiddle what Im trying to do https://jsfiddle.net/wj5gnafm/1/

Solution

Based on the fiddle that is now provided in question, you don't even need a counter. You should be able to achieve this just by using the class and negation selectors that I had mentioned in my original answer. Below is a sample snippet.

td {
  border: 1px solid;
}
table tr.iRow td:nth-of-type(1):before {
  content: 'Date ';
}
table tr.iRow td:nth-of-type(2):before {
  content: 'Fr ';
}
table tr.iRow td:nth-of-type(3):before {
  content: '';
}
table tr.iRow td:nth-of-type(4):before {
  content: 'Se ';
}
table tr.iRow td:nth-of-type(5):before {
  content: 'Dr ';
}
table tr.iRow td:nth-of-type(6):before {
  content: '';
}
table tr.iRow td:nth-of-type(7):before {
  content: 'A ';
}
table tr.iRow td:nth-of-type(8):before {
  content: '';
}
table tr.iRow td:nth-of-type(9):before {
  content: 'Mb ';
}
table tr.iRow td:nth-of-type(10):before {
  content: '';
}
table tr.iRow td:nth-of-type(11):before {
  content: 'I ';
}
table tr.iRow td:nth-of-type(12):before {
  content: '';
}
table tr:not(.iRow) td:nth-of-type(1):before {
  content: 'Date ';
}
table tr:not(.iRow) td:nth-of-type(2):before {
  content: 'Fr ';
}
table tr:not(.iRow) td:nth-of-type(3):before {
  content: 'Se ';
}
table tr:not(.iRow) td:nth-of-type(4):before {
  content: 'Dr ';
}
table tr:not(.iRow) td:nth-of-type(5):before {
  content: 'A ';
}
table tr:not(.iRow) td:nth-of-type(6):before {
  content: 'Mb ';
}
table tr:not(.iRow) td:nth-of-type(7):before {
  content: 'I ';
}

<table>
  <tr class='iRow'>
    <td>A</td>
    <td>B</td>
    <td>C</td>
    <td>D</td>
    <td>E</td>
    <td>F</td>
    <td>G</td>
    <td>H</td>
    <td>I</td>
    <td>J</td>
    <td>K</td>
    <td>L</td>
  </tr>
  <tr>
    <td>A</td>
    <td>B</td>
    <td>C</td>
    <td>D</td>
    <td>E</td>
    <td>E</td>
    <td>E</td>
  </tr>
</table>

Answer for original question:

As I had mentioned in my comment to the question, you cannot pass the counter's value as argument to the nth-of-type (or any other nth-*) selectors.

You can achieve your expected output by doing the counter-increment only when the required class is present (by using class selector) and use :not([classname]) to increment the other counter.

While displaying the value, make use of either the class or the class-negation in the selector and then display the value as required. Below is a sample snippet.

table {
  counter-reset: section, section-other;
}
table, tr, td {
  border: 1px solid;
}
table tr.iRow {
  counter-increment: section;
  background: sandybrown; /* just for distinction */
}
table .iRow td:nth-of-type(1):before {
  content: "Foo." counter(section)" ";
}
table .iRow td:nth-of-type(2):before {
  content: "Bar." counter(section)" ";
}
table .iRow td:nth-of-type(3):before {
  content: "Baz." counter(section)" ";
}
table tr:not(.iRow) {
  counter-increment: section-other;
  background: wheat; /* just for distinction */
}
table tr:not(.iRow) td:nth-of-type(1):before {
  content: "ooF." counter(section-other)" ";
}
table tr:not(.iRow) td:nth-of-type(2):before {
  content: "raB." counter(section-other)" ";
}
table tr:not(.iRow) td:nth-of-type(3):before {
  content: "zaB." counter(section-other)" ";
}

<table>
  <tr class='iRow'>
    <td>A</td><td>B</td><td>C</td>
  </tr>
  <tr class='iRow'>
    <td>A</td><td>B</td><td>C</td>
  </tr>
  <tr>
    <td>A</td><td>B</td><td>C</td>  
  </tr>
  <tr class='iRow'>
    <td>A</td><td>B</td><td>C</td>  
  </tr>
  <tr>
    <td>A</td><td>B</td><td>C</td>  
  </tr>
  <tr class='iRow'>
    <td>A</td><td>B</td><td>C</td>  
  </tr>
  <tr>
    <td>A</td><td>B</td><td>C</td>  
  </tr>
  <tr>
    <td>A</td><td>B</td><td>C</td>  
  </tr>
</table>