There is a typo in line 39 of paper-scroll-header-panel/demo/drawer-panel.html. Inside the custom css, one of the semi-colons needs to be removed, that is: background-color: var(--paper-grey-200, #eee);; should be change to background-color: var(--paper-grey-200, #eee);.
There is a typo in line 39 of
paper-scroll-header-panel/demo/drawer-panel.html. Inside the custom css, one of the semi-colons needs to be removed, that is:background-color: var(--paper-grey-200, #eee);;should be change tobackground-color: var(--paper-grey-200, #eee);.