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13 JavaScript Techniques to Improve Your Code - Habilelabs

We all write codes in different ways with a different style and most of the times forgot about standardization, let’s discuss JavaScript Techniques to Improve Your Code.

This post includes the top tips to write JavaScript code, that would make your code Apple of one’s eye. This post is for javascript beginners only.

For newbie javascript developers, Javascript is a client-side scripting language. If you want to use it on server-side, you have to use some specific framework like Nodejs. The World of javascript has been changed since Nodejs framework has come into action.

For an experienced developer, you know that almost all web applications use Javascript as primary, you should know about these tips. These tips will make your code clean. Understand that, when I say clean code, that points to the code that is:

  1. Easy to understand, no matter that code is given to some other developer.
  2. Easy to maintain, means small changes can be made

So, I am going to share these tips, that I have learned during development. These tips will start with an easy to advanced level, So don’t be bored If you already know the starting ones.

1. Uses of proper variable name:

This is the first tip that you have to learn if you want to be the best developer. A variable name should be relevant to the function. These are some convention I follow during naming:

  • Variable and function names are written as camelCase.
  • Global variables are written in UPPERCASE.
  • Constants (like PI) written in UPPERCASE.

2. Uses of proper text-indent in code snippets:

Your code might have good logic with proper variable naming but there is a question. Is the code easy to read? Giving a proper text-indent means providing right space in each line.

There is some good example for it.

3. The power of comments:

The only thing that can make your code more reusable is the way you use comments for it. If you don’t know how to write the proper comments, then your life as a programmer will be in danger. In above example, you can see that after each if-else condition, how a comment is written.

4. No need to use var for multiple times:

Exactly, There is no need to use ‘var’ to initialize multiple variables. Instead of, you can initialize in following way-

5. The power of Comma Operator:

For making your code small, you can use comma operator in following way-

The operation applied to variable x and y can be simplified with the help of the comma operator. As you can see in the following example-

6. Use of ‘===’ instead of ‘==’

We know about it but somehow they always forget to use it. But it makes a large difference in what they code and fills their code like bugs.

For javascript newbies, ‘==’ is used in time of comparison, when you want to compare only values, and use ‘===’ when you want to compare a variable value as well as its data type. So use these comparison variables wisely.

For example-

7. Magic of ‘use strict’

This statement gives your code the power that you can’t use undeclared variables. This makes your code hard to break and easy to maintain. You can use it as following at the above of each program file-

8. Verify variable Before use:

Before using an argument passed to function, you should check its data type. Otherwise, your code will break. There is a javascript function to check each and every data type named ‘type of’. You can use it in following way-

For more information, go to https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof.

9. Use for loop in an optimized way:

A normal for loop looks like this, but this doesn’t mean that we should do it in exactly the same way. We all should avoid this syntax and try as following-

As per this above loop, the instantiation of i  and length variable is done exactly one time that makes your code fast.

10. Use of Comparison operators

This is the normal way, you perform a conditional statement. But with help of conditional operators like ‘&&’ and ’| |’, we can simplify our code more as following way-

we can simplify our code more using ‘&&’ operator as following way-

11. Use of switch case statements

I have seen in programs that in the case of multiple conditional statements, they use a series of the nested if-else statement. That does execute correctly, but it looks somehow clumsy or hard to understand. So in that condition, we should use switch case statements.

For more information on switch-case, go to https://www.w3schools.com/js/js_switch.asp.

12. Uses of Immediately Invoke function expression(IIFE)( Self-calling function)

An IIFE is a function that executes automatically where you create them in the program. They don’t have any name.

13. Use Javascript tools

At the end, there are a number of websites that you can to make your code beautiful and error free. I will point to these three pillars, that helped me a lot.

  1. https://codebeautify.org/jsvalidate

This website will help you with javascript validation as well as with proper text-indent.

  1. http://lisperator.net/uglifyjs/

This website will help you to provide a minified file of your javascript code.

  1. http://jshint.com/

This website will provide you a complete analysis of your code with a description, warnings, and errors.

Conclusion:

Now you know how to improve your code with help of Javascript techniques. These javascript tips not only make your code look clean but also make easy to understand, fast and optimized.

Habilelabs is a premier software product development and IT-service provider company. We provide best web based and mobile App solutions.

Hope you found this post pretty useful, So don’t forget to share this post.

Please add what technique I missed in this post and what is common mistakes you did most of the times while coding, share with us in the comment.

Vikash is full stack developer at Habilelabs Pvt. Ltd., Jaipur, Rajasthan. He is from Kanpur (U.P.). He is graduated in B.Tech(CSE) from Rajasthan Technical University, Kota. He is passionate to work with web technologies such Angular, Node js etc.

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Anthony Hu

"iSEEit has been closely working with Habilelabs team ever since our company needed to step up development efforts. Being a rapidly evolving software company, we have come across a multitude of challenges over time but Habilelabs has proactively solved issues impacting the business and handled the continuous releases of the applications without downtime. We are very satisfied and happy to have found Habilelabs as our offshore development partner as they have developed a good understanding of our own vision and work flows."

iSEEit

Rizan Flenner

"Amazing and skilled team we been learning from each other for quite some time, and still working together.
Always available and ready to make great results, or to improve unexpected problems."

Siquo

Daniel White

https://www.siquo.com/

"I am very pleased with the work Habilelabs provides. Every time we have worked, projects were delivered on time. They provide great support and I would totally recommend Habilelabs to anyone that wants to get a project done on time and professionally."

Tableluv

Xenophon Kanarios

http://tableluv.gr/

"Habilelabs is an excellent and affordable programming team that delivers fast results."

Paiusa

Stephen Blaney

http://www.paiusa.com/

"Good mindset, good technical competence and skills, always fix problems when needed."

Denthub

Arash Fard-Rahmani

"We have been extremely satisfied with the project that has been delivered by Habilelabs. They are very professional with great commitments. Quality of communication and problem solving skills were perfect."

Safak Korkut

"Very much satisfied the work. Team quickly understood the requirements and completed work on time. Would definitely recommend him. We will like to hire them again"

Stanislav M.

"Habilelabs is the definition of professional and friendly. They knew exactly what they are doing and never shy to share their knowledge. We will definitely consider hiring them for future projects! Great Work!"

Eben B.

"Great work, will hire team Habilelabs again. I appreciate the extra effort. Excellent work as always."

Saasmath

"Very fast and professional Team. They knows exactly what needs to be developed to achieve the project goal. We will hire them again"

Mediaroot

"Very good work, Little expencive for us but prefere to work with them because I'm sure the work will be done 100%"

ProwebMedia

"Team habilelabs is a pleasure to work with and we will work with them again. They are professional, easy to communicate with, and completes tasks on time and on budget."

KCRW

"Really impressed with the high quality work and professionalism!"

Vaibhav Samadhiya

"We worked Habilelabs team and they are very professional, motivated and experienced developer. I would love to work with them in the future again!"

Mahdishahadat

"We had a great collaboration with Habilelabs. They are very communicative, extremely competent and responsive. We are looking forward to continuing our collaboration with Habilelabs. I recommend them with full confidence."

Safkutkorfak

"I'm very impressed with work quality. Habilelabs shows outstanding performance and knowledge in area needed for our project. I'm fully satisfied with Habilelabs's service. Will look for more opportunities to work with them"

AdramMedia

"Team habilelabs are truly great developers to work with, and ensure that the work is completed to the highest of standards. Real pleasure to work with would highly recommend for Node.js / React.js work."

Liamsm

"Habilelabs is a fabulous company. Excellent in quality and always available for communication. We hired Habilelabs team for doing the frontend of my application and they gave me some good tips about backend APIs as well, which tells a lot about their overall expertise. Really appreciate their sincerity, timely delivery and professionalism. Will definitely hire them again in future."

Atul Shrivastava

"very good very profasional, They did good job on time +++"

Moshe Levy

"Love the Company Habilelabs . Knew thier stuff and really came through for me."

Zehash

"5 stars work, very good communication, timely delivery."

Anthony Hu