I am new to HTML and front-end developing. I want to create a Multi-select dropdown with following features:

1. It should be a multi-select dropdown
2. It should be a sorted category wise, so if I select the category header all items in that category get selected.
3. It should be searchable.
4. List item

I tried making the visual on paint, here it is: enter image description here

Thanks a lot for your help.