What are filters in Angular 2?

A filter is a necessary phase of Angular 2 as well as Angular 4. It is basically used to filter an object from a crew of items, which are there in an array or an object array. It selects a subset of the objects from an array and returns it as a new array and displayed on UI. Filters can be used with an expression using pipe | sign. {{expression | filterName:parameter }} Angular 2 includes various filters to layout records of special fact types.