You've got the hang of this whole JavaScript thing. Your code works on ancient browsers, and positively sings on new ones. AMD, SPA, MVC -- you can do that stuff in your sleep, amirite? 

But now your users are trying to type in your Very Important Form, and nothing is showing up; you loaded Backbone into your app right there on line 1, but window.Backbone is nowhere to be found; that widget that's supposed to end up in a certain div is showing up somewhere completely different; calls to jQuery's .css() are doing absolutely nothing; and, rarely but not never, your app just doesn't load at all.

You thought you had the hang of this whole JavaScript thing, but now you're in the world of third-party JavaScript, where all you control is a single script tag and where it's all but impossible to dream up every hostile environment in which your code will be expected to work. "It works on my machine" has never rung quite so hollow.

In this talk, we'll take a look at some of the delightful bugs we've had to solve at Bazaarvoice while working on the third-party JavaScript app that collects and displays ratings and reviews for some of the world's largest retailers.

About Rebecca Murphey

Rebecca Murphey is a staff software engineer at Bazaarvoice, where she leads the team that develops the third-party JavaScript application for collecting and displaying ratings, reviews, and other social commerce content. She is a frequent speaker on the topic of code organization and best practices at various JavaScript conferences, including Front-End Ops Conf, the 2014 jQuery Conference in San Diego, JSConf US 2013, JSConf US 2011, JSConf EU 2010, Full Frontal 2012, Fronteers 2012, and many others. She lives in Austin, TX, with her partner, their son, and their dog.

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