Using document.getElement byID() in HTML field source code doesn't work - Known Error

Using document.getElement byID() in HTML field source code doesn't work Description Using document.getElement byID() in HTML field source code doesn't work

Steps to Reproduce

1. Login to any OOB instance 2. Navigate to KB articles 3. Fill in all required details 4. Create article body in the source code using "document.getElement byID()" 5. Save the article. 6. Click on view article 7. Click on the created button used in "document.getElement byID()" 8. Nothing is happening 9. source code used is working outside ServiceNow

Workaround This is expected behavior and by design in all currently supported releases.