16 JavaScript Concepts JavaScript Professionals Must Know Well

»july. 9 2013 62

(Essential JavaScript Concepts for Modern JavaScript Development )

If you plan to work as JavaScript Professional, you must know some JavaScript concepts and JavaScript-related web-development technologies, particularly as a modern JavaScript developer. If you know the 16 concepts enumerated below, you have the skill necessary to build world-class modern JavaScript web applications, and you are set for the near future—0 to 3 years.

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By the founder of JavaScriptIsSexy

I will expound on each of these sixteen concepts, and I am hopeful all of us will have become better JavaScript programmers by the time we get through all of them. I have completed most of the 16 concepts with just a few more to go, so keep reading and learning. And sign up for the newsletter to get the latest updates.

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I trust you have learned JavaScript properly or you already know JavaScript enough to build a simple JavaScript-only web application. While the 16 concepts note below are neither complex nor difficult, you will understand them best if you already know at least some basic JavaScript.

The sixteen concepts that every modern JavaScript developer should know well follow:

  1. JavaScript Objects in Detail
  2. JavaScript Prototype in Plain, Detailed Language
  3. JavaScript Variable Scope and Hoisting Explained
  4. Understand JavaScript Closures With Ease
  5. Understand JavaScript Callback (Higher-Order) Functions
  6. Understand JavaScript’s “this” With Clarity, and Master It
  7. JavaScript’s Apply, Call, and Bind Methods are Essential
  8. Learn HTML5, CSS3, and Responsive WebSite Design
  9. Object Oriented JavaScript (OOP in JavaScript)
  10. Learn Node.js Completely and With Confidence Or Learn Meteor.js Properly
  11. JavaScript Custom Events with PubSub (coming soon)
  12. Unit Testing Your JavaScript Applications is Essential
  13. DOM (Document Object Model) and BOM (Browser Object Model)
  14. ECMAScript 3 and 5
  15. The Best JavaScript Front-end Frameworks You Should be Using
  16. Preventing and Handling JavaScript Errors and Debugging Your Code
  17. BONUS: JavaScript Design Patterns that Every JavaScript Developer Should Know (coming soon)

Be good. Sleep well. And enjoy coding.

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Within 8–10 Months, Earn MORE than the Avg. New CS Graduate Earns.

New Prices (Monthly Subscription):
Basic: $250/month, Pro: $350/month, Premium: $600/month

By the founder of JavaScriptIsSexy


  1. Great information. Lucky me I ran across your website by chance (stumbleupon). I have book marked it for later!

  2. Dieter

    In which year you publish your articles? 😉

    • Richard Bovell (Author)

      Dieter, I had to chuckle when I read your comment, because you are correct. I had not been sticking to my own schedule, and it probably seems like those dates for upcoming posts were for another year :).

      I uploaded 2 new posts within the last 2 days and I plan to add 2 more today.

      • Karam

        Man, I’m loving your posts, i’m going through learning JS properly. is there any chance you will continue posting or did you stop?

  3. Tyler Shipe

    I’m enjoying this series. Thank you for your work!

  4. Hi there everyone, it’s my first go to see at this web site, and article is genuinely fruitful in favor of me, keep up posting such posts.|

  5. mjankowski

    great blog! I’ve been using JS for years and I didn’t know many of those techniques!

  6. Mike

    will you be writing an article for each of the 16 concepts above, as currently only the first 4 link to an article?

    • Richard Bovell (Author)

      I had plan to originally, and i have written many of them already. I have to update this article, which I will do in about a week. And I will likely write the rest of the article over the coming months.

  7. David Carrus

    I’d really like to thank you, for pointing me to the right direction in my “javascript quest”.

    I studied a lot of things following your articles and / or suggestions and i found them so helpful that i felt the need of thanking you.

    Keep up the good work, i’m going to follow your articles.

  8. mkaze

    Thank you so much! Your blog is great and I think you are a great man, too.

    Many Many Thanks!

  9. mona

    great tutorials! .. understandable explaination!!

  10. very useful and great article

  11. Cakness

    Bookmarked for glory!

  12. Tanvi P

    Enjoying the series! Waiting for next posts :)

  13. Rajiv Kumar Gogoi

    Awesome website, definitely one of the best javascript websites…Great work!!!

  14. Joy Misaal

    I love the series. It has been very helpful. However, I really wish the remaining posts come up soon.

  15. Marcel dos Santos

    Hey man, congratulations for this great work! The way you explain the concepts are awesome… I’m learning a lot and following all ’16 JavaScript Concepts JavaScript Professionals Must Know Well’ lessons… I’m to anxious to the 11th and 12th lessons… Please, keep your great work!

    Greetings from Brazil,

    Marcel dos Santos

  16. tc

    Thank you so much! These best JS tutorials I have come across. Perfect for me @ my current skill level.

  17. Sabal Prasain

    It’s awesome ! Love these posts !! Thanks !!!

  18. frog

    Is the site dead?

  19. Vinayak

    Great post .. Thanks Richard..!!

  20. praveen

    Hi Keep up the good work sir.The article are really good.

  21. Tarek

    Thanks for the great posts :)

  22. MOr


    Are you planning on posting the last 7 concepts?


  23. sakib

    I am waiting for part 11-17 . do you have plan to upload those in near future?

    Great tutorial.hats off to you.

  24. Poonam

    Hi Richard,

    Thanks for such a nice tutorial, l love it, very nice :)

  25. love her. We follow her blog.
    Thank for a good post.

  26. Great post…. Thank you!

  27. Nice blog.Thanks for posting this. We are same fields .

  28. Hi Richard,
    A big thanks to you for these post. After reading these posts I feel how stupid i am before reading these. Every weekend I read your post again and again.

  29. Rakesh

    Thank you for such nice tutorial!!

  30. yusuf

    are you planning to finish the missing lessons or not

  31. Sharon

    The posts are very useful. Can you please finish the remaining topics?

  32. Shesh

    Hi Richard,

    You have absolutely the best tutorials on the internet for those who are confused between the various styles of OOP. Very streamlined and ordered – and that is difficult for javascript.

    Node.js has evoked special interest towards javascript as a go-to language for mobile-web.

    The best part is that you have cared to correct the mistakes and the comments are educative too, they tell me where mistakes can happen (though various tools are making it easier for the developer to detect errors :)).

    Do you have any tutorials on Javascript using jQuery styling on your website?. I could not locate them.


  33. Dwayne

    I’m catching pretty late, but it seems these concepts are stilly very relevant, its a very unique site.

  34. Wasim Ghumro

    This is a great resource and bookmark worthy. Thank you.

  35. Ash

    Thank you for this brilliant post.

    In the jquery button click example, I am curious to find out how the anonymous function is called by the arguments object of the containing click function.

  36. srishti

    Thank you for such a great post.It is very informative.

    Can you start this kind of posts for angular js too.It will be very beneficial if you can provide the different study plans for beginner and intermediate level.

  37. DK

    Thanks man for this article!

  38. Pradeep

    Excellent series.

  39. Archana

    This is a great blog. Many thanks. Waiting for the remaining posts.

  40. Thank you!!!
    Great explanations, very clear, to understand, hope to take your advises forward…
    take care

  41. chandu

    great work..

  42. krunal patel(DB)

    Great post…. Thank you!

  43. Andres

    These posts are amazing! Thank you for taking your time to write them up. Where can I find the posts from the 11th to 17th? I’m specially interested in “15. The Best JavaScript Front-end Frameworks You Should be Using”. Thanks so much again.

  44. tico

    Hey man, great site!!!
    Just wanted to mention one more concept that you could add and it’s automation. And with this I mean using gulp or grunt or any other tool for repetitive tasks, like minifying, copying, checking code statically, etc… I know it’s not a concept related to just Javascript but as we don’t have real IDEs it’s really helpful to know this tools…


  45. andre isaacI

    Great articles! I’m am autodidact and i have learned html css and javascript at web content, and i have to say this is one of the best content i find out about javascript, i’m currently using angularjs but i feel that i need to improve my js skills and here i am. Absorbing information here! Thank you for your helpful work.

  46. Kausha Shah

    Bookmarked !!

  47. dibeesh

    Super…Your tutorials are awesome…Learned a lot from you site. Please keep writing its very helpful.

  48. Avnesh

    It’s awesome. It helped a lot for building my thought process for JavaScript.

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