The days of building fixed-width web pages from pixel-perfect Photoshop files are gone. In order to produce flexible layouts that smartly adapt to any screen size, our workflows have undergone changes to be more iterative and agile. We’ve come to understand the importance of modularity and how it facilitates the flexibility we need to stay nimble in the browser. As a designer and front-end developer, this flexibility is integral to how I approach web projects. I find myself making design decisions in the browser more often than design files, and to support this workflow I need the ability to build user interface modules that can be easily extended.