As projects get older, the dependencies used at the time get older too. If you don't update these packages regularly they could get out of date and might cease to work over time. Most modern web projects contain dependency management through npm. When the project is setup and worked on

Update 09/2016: Looking to set up ESLint instead of JSCS? [https://www.themarketingtechnologist.co/eslint-with-airbnb-javascript-style-guide-in-webstorm/] Having a consistent style in your code is important for maintaining readablility and makes the code easier to understand. You can use different code styles, the most important thing is to stick to one