I want to create a RegExp that takes in a variable as part of the string.

I am parsing a list of options and I want to select the option based on if it's text contains a number but the problem is that just using .includes('1') will select 1: and 10:

I want the RegExp to do this:

/^{myNumber}:/

The option list I am trying to sort has numbers that look like this:

1: this is a string

2: comment

3: option

        let locatedTask = $task.find('option').filter(function() {
          if($(this).text().includes('1')){ 
            return $(this).html();
          }
        });