HTML and JavaScript auto increment number

Question

I am new to HTML and JavaScript. I got a problem like this in HTML (This code below only visualize the problem for you to easy to reference.)

<tr>
    <td>1</td>
    <td>Harry</td>
</tr>
<tr>
    <td>2</td>
    <td>Simon</td>
</tr>
    <td>3</td>
    <td>Maria</td>
</tr>
</tr>
    <td>4</td>
    <td>Victory</td>
</tr>

This is a name list, however the problem is that sometime i need to add more name into this table and I HAVE TO ADD in front of Number 1, so meaning i have to re-write the number list, (EX: 1 1 2 3 4 --> 1 2 3 4 5). I feel that is not a good way.

NOTE: I don't want to change the list number decrease from top to bottom. And this is a HTML file so can't apply PHP

Anyone can help me to make the number to a variable like "i" and a function can help me to fill variable i increment from top to bottom automatically like

<tr>
    <td>i</td>
    <td>Harry</td>
</tr>
<tr>
    <td>i</td>
    <td>Simon</td>
</tr>
    <td>i</td>
    <td>Maria</td>
</tr>
</tr>
    <td>i</td>
    <td>Victory</td>
</tr>

Function Fill_i for example: I think that JavaScript should be used in this case. Thanks for your help and suggestion on this problem.

Again: I am not allowed to use PHP or ASP and when I add a new name, I add it manually by HTML.

Answer 1

You can use a css counter - MDN

table {
  counter-reset: section;
}

.count:before {
  counter-increment: section;
  content: counter(section);
}

<table>
  <tr>
    <td class="count"></td>
    <td>Harry</td>
  </tr>
  <tr>
    <td class="count"></td>
    <td>Simon</td>
  </tr>
  <tr>
    <td class="count"></td>
    <td>Maria</td>
  </tr>
  <tr>
    <td class="count"></td>
    <td>Victory</td>
  </tr>
</table>

FIDDLE