This is an example of how you can create a dynamic search bar to filter CMS collections. I'm using Finsweet's Attributes Filtering solution with some custom JavaScript to enable users to use an input to search through existing categories for the CMS and select them to enable filtering. This will display a checkbox that can then be unselected. I've also added the possibility to use keyboard navigation in for the suggestions and using Enter to select a suggestion. I hope this helps! Feel free to clone and modify ;)

cmsfilter,  dynamicfilter,  cms,  finsweetattributes