Inline Validation

This tutorial will show you how to implement inline server-side field validation in Rails with only a few lines of IntercoolerJS.

Here are the steps for implementing inline validation

Extract a partial of the input div, and wrap it with a new div with an ID so we can target it for appending.
Create an route that will render the partial input and implement non-updating validation in the controller.
Add the ic-post-to annotation to the input and target the wrapping div with an ic-target annotation.

Here's a diff between the standard rails form code and the IntercoolerJS inline validation version: