---
layout: post
title: "errors.js - Client Side Errors Object"
date: 2012-03-30 02:05
comments: false
categories: javascript, errors, rails, client
---

Despite my opinions of ActiveModel::Validations (a post/patch for another day),
I like ActiveModel's Errors object. Errors's simplicity, uniquity, and
consistency is a great boon for handling error messages of varying entities.

The future of the web is asynchronous and client side computation is steadily becoming more
sophisticated and well practiced.

So let's say you've either fired off an asynchronous request or client side
validation that generated errors, errors.js provides an Errors object similar
to ActiveModel's Errors object to provide a simple, ubiquitous, consistent
interface to handle and use error messages on the client side.

Here's error.js's source,

{% gist 2246787 %}

It's small and really simple, and only depends on underscore.js. A complete use of it would look something like
this,

I toyed with actually implementing the handler, but then I'd have to parse the
response and I currently don't want to depend on something like jQuery.


people.js, to initialize our events and objects,

{% gist 2246796 %}

people\_controller, to do what controllers do,