Migrating to web-components

[gfellerph]

Details on how to migrate from ng-bootstrap to web-components.

ng-bootstrap component	Migration path	Status
Accordion	Custom component post-accordion	✔ Done
Alerts	Custom component post-alert	✔ Done
Carousel	Won't replace (#2889). Might re-introduce with CSS Carousels when support is good enough	❌ Deprecated
Collapse	Custom component post-collapsible	✔ Done
Datepicker	Use `	❌ Deprecated
Dropdown	Use post-menu	✔ Done
Modal	Superseded by <dialog> (#2772)	✔ Done
Pagination	Custom component post-pagination (#2341, #2801)	Open
Popover	Use native popover attribute with polyfill	✔ Done
Progressbar	Custom component post-progressbar (#3157)	Open
Rating	Custom component post-rating	✔ Done
Tabs	Custom component post-tabs	✔ Done
Timepicker	Custom component post-timepicker (#3158)	Open
Tooltip	Use native popover attribute	✔ Done
Typeahead	Custom component post-typeahead or look for third party web-component	Open
Datatable	#1200	Open
Custom select	Custom component post-select	Open
Icons	Custom component post-icon	✔ Done
Intranet header	Future post header will be used for internal applications as well, Angular component will be deprecated	❌ Deprecated
Notification overlay	Use native dialog element	✔ Done
Post cards	Use css subgrid for pricing cards, otherwise CSS only	✔ Done
Stepper	Custom component post-stepper	✔ Done
Subnavigation	HTML/CSS Component	✔ Done

[gfellerph]

How can we deliver polyfills for the styles package for components that only use HTML/CSS but some of the latest features that need polyfilling, e.g. [popover]?

[gfellerph]

For popover, it's easier to provide a layer of abstraction with additional features around positioning and indicator arrow display, therefore creating a web component for it makes most sense at the moment. Also, the styles for the popover polyfill are delivered via JS.