Conditional elements in html

var enjoyhint_script_steps = [ { "next #first": 'text', }, { "next #second": 'text' }. 

'#first' is conditional. if the "#first" is not in the HTML code script is not running. 

If any id is not present in HTML it should ignore and run the next line.

error
Uncaught TypeError: Cannot read properties of undefined (reading 'getBoundingClientRect')
    at enjoyhint.js:154:60