I've done 2 projects recently that put the front-end on hold to wait for the API to be built. If the RESTful API isn't already mapped, now you can use this API for front-end testing until your API is ready.
If you're building a new app and need to direct a designer on styles, check out Google's Material Design Spec. Just as flat design was all the rage 1-2 years ago, material design is in vogue now and Google's spec is incredibly thorough.
We've all been there - our designer has designed a beautiful website that has a hip effect for the first 3 lines of some of the paragraphs. Unfortunately, CSS doesn't have a "lines-1-through-3" property. That's where Lining.js swoops in and saves the day.
"Sass is like Pringles: once you pop, you can’t stop". So how do you deal with a client who you know doesn't use Sass, but will certainly make CSS updates? This threshold point doesn't need to be broken...