How can get comment id from comment link?

Question

Let's say that this is the comment link:

http://localhost/post/test/#comment-86

I want to do this thing:

• Check if current page URL requesting a comment or not (have #comment-x or not).

• If current page URL is requesting a comment get the comment id from the URL.

Answer 1

Based on your comment, you can get the comment ID via JavaScript, and here's a sample function you can use/try:

<script>
function getCommentIdFromUrl( url ) {
    return (
        ( url && /#comment-(\d+)$/.test( url ) ) ||
        ( location.hash && /^#comment-(\d+)$/.test( location.hash ) )
    ) && RegExp.$1;
}
</script>

So if the URL of the current page is http://example.com/hello-world/#comment-76, getCommentIdFromUrl() would return 76.

Alternatively, you could ignore the above function and use the second expression with a variable, like so:

var comment_ID = location.hash && /^#comment-(\d+)$/.test( location.hash ) && RegExp.$1;

Hope that helps.

[EDIT] In reply to your comment on my answer, you can ignore all the above code, and use this instead:

var
    // Check if the current URL ends with a #comment-123, where 123 is the comment ID.
    is_comment_link = /#comment-(\d+)$/.test( location.href ),

    // Removes the #comment- portion from the URL hash, and get the comment ID.
    comment_ID = is_comment_link && location.hash.substring(9);

Or you could also use:

var is_comment_link, comment_ID;

if ( /#comment-(\d+)$/.test( location.href ) ) {
    is_comment_link = true;
    comment_ID = RegExp.$1;
}