Vanilla framework documentation
Side bar accordion, used in listing pages or as navigation. Can hold multiple navigation items or to be used as a filter of content. Use to hold filtering items (header and content if available). Do not use to display page content.
Each tab styling can be changed to open or collapse using
true for open and
false to close. Using JS this can be changed and to point to what each tab controls via
.p-accordion__panel visibility is effected by
aria-hidden and again can be manipulated with JS.