How Can I Write Better In JavaScript?

1. Always “use strict” On. …
2. Use Function expressions instead of Function Declarations.
3. Stop using “var”! …
4. Use “const” and immutability as much as possible. …
5. Prefer Pure Functions. …
6. Prefer Class over Constructor Functions. …
7. Use “destructuring” …
8. Only work with data you need.

How do you write a better function in JavaScript?

1. Introduction.
2. Call things by their name — easy, short and readable variable and function names.
3. Avoid globals.
4. Stick to a strict coding style.
5. Comment as much as needed but not more.
6. Avoid mixing with other technologies.
7. Use shortcut notation when it makes sense.
8. Modularize — one function per task.

How should JavaScript be written?

1. Writing and executing JavaScript directly in the Browser Console is the simplest way to get started. …
2. The second option writing JavaScript code in the index. …
3. The third and last way to write JavaScript code, is writing the code in a separate JavaScript file and linking this file in the HTML file.

What is the fastest way to write JavaScript code?

1. Prefer Built-In Methods. …
2. Use the Best Object for the Job. …
3. Don't Forget About Memory. …
4. Use Monomorphic Forms Where Possible. …
5. Avoid the ‘Delete' Keyword.

How do you write clean code with JavaScript?

1. Write simple code. …
2. Write linear code. …
3. Better naming of variables and methods. …
4. Functions should do one thing.

Where can I practice JavaScript?

• Code School. Great for beginners. …
• Codecademy. For complete beginners that are initially learning a language. …
• freeCodeCamp. …
• Treehouse.

What's JavaScript used for?

JavaScript is a text-based programming language used both on the client-side and server-side that

allows you to make web pages interactive

. Where HTML and CSS are languages that give structure and style to web pages, JavaScript gives web pages interactive elements that engage a user.

Where do you code?

• Codecademy. Codecademy is the perfect place for aspiring coders to start learning. …
• Free Code Camp. …
• Codewars. …
• The Odin Project. …
• HackerRank. …
• CodeFights. …
• edX. …
• Upskill.

Can we write JavaScript in notepad?

Since JavaScript is interpreted by the browser itself, we don't need any fancy compilers or additional software to write JS programs. All you need is: A text editor. Your humble Notepad will do just fine, but we highly recommend

Notepad++

(free).

How do I get JavaScript?

1. Click on the “apps” option on your phone. Select the “Browser” option.
2. Click the menu button in the browser. Select “Settings” (located towards the bottom of the menu screen).
3. Select “Advanced” from the Settings screen.
4. Check the box next to “Enable Javascript” to turn the option on.

Is JavaScript delete slow?

It's usually much more efficient to delete items from a hash in bulk (most operations on the same thing work better in bulk) but the delete keyword only allows you to delete one by one. That makes

it slow by design for cases with multiple deletes on the same object

.

Which is faster object or array?

Generally it is faster to use object key value pairs when you have large amounts of data. For small datasets,

arrays

can be faster. … Also looping through arrays are faster than looping through keys, so if you plan on doing operations on all items, it can be wise to put them in an array.

What is a sparse array in JavaScript?

What are sparse arrays? A sparse array is

one in which the elements are not sequential

, and they don't always start at 0. They are essentially Array s with “holes”, or gaps in the sequence of their indices. … If the array is sparse, the value of the length property is greater than the number of elements.

What are clean code principles?

Clean Code Principles. … A

design principle originating from the U.S. Navy that goes back to 1960 already

. It states that most systems should be kept as simple as possible (but not simpler, as Einstein would have said). Unnecessary complexity should be avoided.

What is scalability in JavaScript?

When you call a JavaScript function, you need to provide the arguments in the specified order. … With this pattern, your function becomes

easily scalable

as you can extract more information from the incoming object argument value without having to change the function call syntax in the code.

How do you write a clean code?

1. 12 Conventions for Writing Clean Code. Your peers will thank you later. …
2. Magic Numbers. A magic number means we are assigning a number with no clear meaning. …
3. Deep Nesting. Sometimes we use nested loops that are difficult to understand. …
4. 3. Comments. …
5. Avoid Large Functions. …
6. Code Repetition. …
7. Variable Naming. …
8. Meaningful Names.