What does an attribute on a component do?

Question

Angular

Component specifies another component

<table-fields fields="fieldsList" (fieldsChange)="fieldsChange($event)"></table-fields>

What does ? And how to use it? fields="fieldsList"

Answer 1

This is @Inputthe one that passes the list of objects to display, only spelled wrong - needs to be wrapped in square brackets.
fieldsChange is @Output, respectively.