Today, we will build our own custom AngularJS filters. We’ll start simple and build a couple filters that manipulate numbers and strings, then we’ll build a filter that manipulate an entire data set. Finally, in our previous article where we discussed the built in AngularJS filters, Pierre-Adrien asked how we could use the built in Angular currency filter to display the currency denomination after the amount (i.e. 9.99$ instead of $9.99) as is common in some places of the world. Unfortunately, the built-in currency filter does not support this functionality, so we’ll build our own that does!