JavaScript を使用して単語全体のみを検索するにはどうすればよいですか?

const lookup = '\n\n\n\n\n\n2    PC Games        \n\n\n\n';
const textbox = document.getElementById('textbox');

// Trim whitespace from 'lookup' for accurate matching
lookup = lookup.trim();

// To perform a dynamic search based on 'lookup', utilize a dynamic regular expression
const regex = new RegExp("\b" + lookup + "\b");

// Test the regex against the value of the 'textbox'
if (regex.test(textbox.value)) {
  // Handle success case: word found as a whole word
} else {
  // Handle failure case: word not found as a whole word
}