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JavaScript Libraries are Not Your Front-End Architecture

· Web Dev Zone

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This is not going to be a post about architecture but more about MHO. Lately, I’m asked to evaluate the architecture of small to big front-end solutions. There is big buzz around front-end development and it drives a lot of companies to build client-side solutions without considering how to build them. One of the misunderstandings I’m facing a lot is calling the existence of JavaScript libraries in the solution a solution architecture. Sorry to say that but

JavaScript libraries are not front-end architecture

Every JavaScript library deals with one or more aspects of your code like namespaces/modules/packages in your server-side app. Whether it is jQuery for DOM interaction, Backbone/Angular/Ember/Knockout for MV* and separation of concerns, require.js for AMD or any other JavaScript library, all those libraries solves some common problems.

Take a moment and ask yourself these question regarding your JavaScript apps:

  • Can your app scale?
  • If you remove one of the modules/features in your webpage is it going to break?
  • Do you have reusable components/features in your solution?
  • Are your app parts tightly coupled?
  • Are your modules/features testable?
  • What is happening when a module/feature is in error state?
  • And more

If you answered those questions that might imply that there is a front-end architecture in your solution. If you can’t answer those questions then you might have problems in your solution.

Building big and scalable JavaScript apps is a difficult task and shouldn’t be undertaken lightly. Using JavaScript libraries helps to make the task less complicated but it doesn’t imply that you have an architecture. I would like to hear your opinion about the subject.

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