如果有多个单词，我如何在 td 中的单词之间添加逗号

Question

Long backstory on this, and this seems to be the simplest solution. I have a table that will populate with user id's from a database. I need to figure out a way to add a comma between id's if there is more than one. The td id is username .

I'm not sure where to really start. I would need to index it and see if the html is > 1. And if so, add a comma between each word. Please help. This is a poc forum and it doesn't suit me to add/use jQuery, so I need to do it in vanilla JavaScript.

Here is the code that pulls it from the database:

if ($this->post['post_thanks_amount'] > 0 && $this->thread['isdeleted'] == 0)
{
    $this->post['post_thanks_bit'] = fetch_thanks_bit($this->thread['forumid'], $thanks);
    $this->post['post_thanks_user'] = $post_thanks_user;
    $this->post['post_thanks_amount_formatted'] = vb_number_format($this->post['post_thanks_amount']);
    $post_thanks_box = fetch_post_thanks_template($this->post);
}

And the output with one user is this:

<tr valign="top">
    <td style="background:#E8E8E8;" colspan="2" class="alt1">
        <div>
            <a rel="nofollow" href="member.php?u=20420">ninja1</a>
            <a rel="nofollow" href="member.php?u=26154">testuser</a>
        </div>
    </td>
</tr>

so after each <a...> if there is more than one, add a comma.

Answer 1

If ids is an array, then just use join :

ids = [1, 2, 3, 4];
val = ids.join(', ');
// val is now "1, 2, 3, 4"

Answer 2

split() automatically puts comma between words, if that's what you're looking for.

var words = 'a b c d';
document.write(words.split(' '));