Exercise 1
- View the parse results.
- Read the explanation.
Explanation:
Error
A proprietary (non-standard) style has been included:
body { scrollbar-base-color: #00c; }
The proprietary style does not exist in the CSS standards. Therefore the parse results tell us,
Property scrollbar-base-color doesn't exist.
Correction
Eliminate the proprietary (non-standard) style.
Avoid proprietary styles, because they do not work across browsers.