Remove node parsing logic and use innerHTML, remove regex for perf

[janechu]

Pull Request

📖 Description

This change simplifies the logic by using innerHTML to parse and removes the regex which had perf implications. This brings the implementation more inline with how the html tag template works.

✅ Checklist

General

• I have included a change request file using $ npm run change
• I have added tests for my changes.
• I have tested my changes.
• I have updated the project documentation to reflect my changes.
• I have read the CONTRIBUTING documentation and followed the standards for this project.