You do not need to memorize everything. In fact, the experienced and professional developers don’t memorize everything.

A lot of beginners ask this question. Do developers memorize everything? Do they memorize the whole programming language and the documentation? Do I need to remember everything to be considered as a professional developer?

The answer to all of these is a BIG

There is absolutely no memorization required as a Software Developer or Developer of any kind. Period.

We live in an era where you can look up nearly any piece of information right from your computer or smartphone.

Never memorize what you can look up in a book – Einstein

This quotation from Albert Einstein is even more relevant today than it was before.

In his time, there were books but nowadays, we have the internet. You can literally find any information on the internet easily.

You really shouldn’t waste time committing details to memory when you really should be remembering the bigger picture and understanding the important concepts.

The most important concepts will stick in your mind because you use them over and over, and the more enigmatic ones will remain forever stored on the internet, do a quick google search anytime you need them.

Below is the guide on what you should memorize from HTML, CSS and Javascript:


For HTML, you should be familiar with 25 to 30 elements.

Here’s a great starting point to get you familiar with the most common HTML & CSS elements.

In HTML, learn the key elements to build a web page; start small and implement your learning. Know how the form element works, once you know all of the ins and outs of the HTML5 form elements, repeat the process with other tags.

You should know the basic tags you’ll be using on a daily basis like; body, div, head, p, ul, li, h1, h2, h3, h4, h5, h6, span, strong, em, table etc. These elements are the fundamentals you should really know.

You should know how to write the HTML5 doctype (Emmet does it for you). Also how to write a script tag for inline Javascript and including a script file.


You should know how to change a font size, color, margin, padding, and width, etc. You should know clearly how to float an element using float left or right, and how to clear a float.

You should know the difference between; em, px, rem and %. You should also know how to write a basic media query if you want your website or application to be responsive across multiple platforms.

It’s totally okay if you don’t know the half-a-dozen different elements that HTML or CSS has. If you need any help, there’s always Google 😏

Javascript 💻

You should know how to query the DOM without relying on any library.

You should know the basic console commands

  • console.log
  • console.error
  • console.dir(object)
  • copy(string)
  • console.groupEnd
  • console.timeEnd(label)
  • console.groupCollapsed
  • console.time(label)

You should know the important concepts such as loops, if-else statements, objects, functions, arrays etc.

Here’s an in-depth Javascript Course you can go through and master the fundamentals.

Continuous Learning

When it comes to programming, there’s never going to be a point at which you can say “I have learned and mastered everything” in a programming language.

But there will be a point at which you will feel more confident than you were before.

All you have to do is to continue to learn and practice.

P.S. If you are just starting out, you can Become a Full Stack Javascript Developer by following the exact techniques and roadmap that Aziz Ali, Founder of Ilovecoding used to become an expert in the field.

I hope you enjoyed reading this blog. If you have any questions, leave your comments below.


Web Developer - Learnaholic - Reader -- I'm passionate about Marketing, Growth Hacking, Business and Web Technology. When I’m not working, I love reading books, learning new skills and indulging my love for seeing new places. I love running, reading books and business blogs.