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Six ES2020 JavaScript Features You Should Watch Out For
In this ES2020 tutorial we’ll look at six features you should be aware of. This includes BigInt, matchAll, promise.allSettled, for… in, optional chaining and Nullish Coalescing operator! Learn these JavaScript features so you can become a better developer!
#javascript
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What is JavaScript - Stackfindover - Blog
Who invented JavaScript, how it works, as we have given information about Programming language in our previous article ( What is PHP ), but today we will talk about what is JavaScript, why JavaScript is used The Answers to all such questions and much other information about JavaScript, you are going to get here today. Hope this information will work for you.
Who invented JavaScript?
JavaScript language was invented by Brendan Eich in 1995. JavaScript is inspired by Java Programming Language. The first name of JavaScript was Mocha which was named by Marc Andreessen, Marc Andreessen is the founder of Netscape and in the same year Mocha was renamed LiveScript, and later in December 1995, it was renamed JavaScript which is still in trend.
What is JavaScript?
JavaScript is a client-side scripting language used with HTML (Hypertext Markup Language). JavaScript is an Interpreted / Oriented language called JS in programming language JavaScript code can be run on any normal web browser. To run the code of JavaScript, we have to enable JavaScript of Web Browser. But some web browsers already have JavaScript enabled.
Today almost all websites are using it as web technology, mind is that there is maximum scope in JavaScript in the coming time, so if you want to become a programmer, then you can be very beneficial to learn JavaScript.
JavaScript Hello World Program
In JavaScript, ‘document.write‘ is used to represent a string on a browser.
<script type="text/javascript">
document.write("Hello World!");
</script>
How to comment JavaScript code?
- For single line comment in JavaScript we have to use // (double slashes)
- For multiple line comments we have to use / * – – * /
<script type="text/javascript">
//single line comment
/* document.write("Hello"); */
</script>
Advantages and Disadvantages of JavaScript
#javascript #javascript code #javascript hello world #what is javascript #who invented javascript
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Hire Dedicated JavaScript Developers -Hire JavaScript Developers
It is said that a digital resource a business has must be interactive in nature, so the website or the business app should be interactive. How do you make the app interactive? With the use of JavaScript.
Does your business need an interactive website or app?
Hire Dedicated JavaScript Developer from WebClues Infotech as the developer we offer is highly skilled and expert in what they do. Our developers are collaborative in nature and work with complete transparency with the customers.
The technology used to develop the overall app by the developers from WebClues Infotech is at par with the latest available technology.
Get your business app with JavaScript
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#hire dedicated javascript developers #hire javascript developers #top javascript developers for hire #hire javascript developer #hire a freelancer for javascript developer #hire the best javascript developers
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A Look at Wooden Watches for Men
Wooden Watches for Men are a very unique, and often understated piece. Unlike the flashy, over-the-top gold and silver metal watches that you see all the time, a wooden watch is a little more reserved and understated. The grain of the wood alone is a signature of its own, and no two pieces will ever be exactly the same. While the movement itself will most likely be made out of the more common components and materials that other metal watches are constructed from, the band, face, and even the wristband are all made of wood.
Some people like the effect of a wood watch, but some people find that they are too delicate. If you’re looking for a watch to wear in the water, for example, you might consider one of the many diving or sailing watches available. These watches can hold up to an experience in the water where metal watch faces might not. A wooden watch can also be a good choice for someone who is just not a fan of watches that have big crystals and glowing parts.
Another thing to consider when it comes to wooden watches for men is that they are generally much more affordable than their metal counterparts. While you do pay a little more for one of these timepieces, you will save on a lot of cost by buying a more durable product. If you have to constantly change watches because your current one is getting worn down, it’s probably not worth spending a bunch of money on a new model.
One of the best aspects of natural wooden watches for men is the way they work. The mechanism used is a sturdy cart with an inner spring. When the wearer wants to tell the time, all he has to do is place his wrist over the cart, which has a small red light that glows. As the light shines upon the dial, it makes the numbers move, allowing the time to appear clearly.
While most quartz wristwatches use mechanical movements, wooden watches for men usually make use of a more complicated style of mechanism. These kinds of timepieces use a type of technology that allows for the timepiece to keep track of multiple time zones. By using a variety of colored woods, designers have been able to make these timepieces look great on both people and animals.
Of course, all of this comes at a price, but it doesn’t have to be prohibitive. For instance, a simple engraved timepiece is an excellent way to give someone a gift, without breaking the bank. If you want to impress that special someone, or if you simply like the idea of a personalized watch, you should definitely look into purchasing one of these unique, classic timepieces. After all, there’s something truly timeless about a wooden wristwatch.
In addition to being very classic and beautiful, wooden watches for men are also highly functional. A popular style features a large, easy to read face on a bright red case, along with a leather strap and gold accents. If you want your watch to be more versatile, you might want to consider a style that makes use of a bezel and a stainless steel case, for example. These types of watches will allow you to wear it with a suit or shirt, or even with your favorite pair of jeans.
If you’re looking for a more sophisticated type of timepiece, you might consider looking into some Wooden Watches UK. Metal is certainly becoming a more popular material to use for watch faces and straps, as well as for the actual watch itself. Unlike wooden watches for men, metal watches can be less expensive and more durable. You might be surprised to find that many metal watches look more like jewelry than a standard watch. This means that you won’t have to worry about your watch falling apart on you. However, if you really want a timepiece with a unique design, you may need to opt for a wooden timepiece for men.
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The essential JavaScript concepts that you should understand
As a JavaScript developer of any level, you need to understand its foundational concepts and some of the new ideas that help us developing code. In this article, we are going to review 16 basic concepts. So without further ado, let’s get to it.
#javascript-interview #javascript-development #javascript-fundamental #javascript #javascript-tips
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Favorite New Features in ES2020 - JavaScript tutorial
JavaScript’s development had been running at a slower pace ahead of the introduction of ES6 (also known as ECMAScript 2015).Now, in 2020, the latest JavaScript features have been finalized and released as ECMAScript 2020 (or ES2020). While ES2020 does not include as many features as they introduced in ES6, it has introduced a number of useful additions. In this article, I will discuss my favorite new features from ES2020.
Optional Chaining
Optional Chaining syntax allows you to access deeply nested objects without worrying about whether the property exists or not. While working with objects, you must be familiar with an error of this kind:
TypeError: Cannot read property <xyz> of undefined
The above error means that you are trying to access the property of an undefined variable. To avoid such errors, your code will look like this:
Instead of checking each node, optional chaining handles these cases with ease. Below is the same example using optional chaining:
You can also check arrays and functions using Optional Chaining. An example is given below:
globalThis
JavaScript is used in a variety of environments such as web browsers, Node.js, Web Workers, and so on. Each of these environments has its own object model and a different syntax to access it. ES2020brings us the **globalThis **property which always refers to the global object, no matter where you are executing your code. This property really shines when you aren’t sure what environment the code is going to run in.
The following is the example of using setTimeout function in Node.js using globalThis:
Below, the same method is used in web browser:
Dynamic Imports
Dynamic Imports is one of my favorite feature of ES2020. As the name implies, you can import modules dynamically. Using dynamic imports, the code is delivered via smaller bundles as required (instead of downloading a single large bundle as has been previously required).
When using dynamic imports, the import keywords can be called as a function, which returns a promise. Below is an example of how you can dynamically import a module when the user clicks on a button:
Promise.allSettled()
This method returns a promise that resolves after all of the given promises are either fulfilled or rejected. It is typically used where asynchronous tasks do not depend upon one another to complete successfully, as illustrated in the following example:
Nullish Coalescing Operator
The syntax for this operator is
let student = {}
let name = student.name ?? ‘John’
This operator will return a Right Hand Side operand when the Left Hand Side operand is either undefined or null. In the example above, the operator will set the value of name as ‘John’ as student.name is undefined.
At first glance this looks exactly the same as a logical OR operator ( || ), however, logical OR operator Right Hand Side operand when Left Hand Side Operand is false (undefined, null, “”, 0, false, NaN). Below is the comparison of both operators:
Chaining Nullish Coalescing Operator ( ?? ) with AND ( && ) or OR ( || ) operators
It’s not possible to chain AND ( && ) and OR ( || ) operators directly with ?? operator. If you need to combine them, then you must wrap && or || operator in the parenthesis
Conclusion
The introduction of ES2020’s new features add even more flexibility and power to the constantly evolving JavaScript. This article explored some of my favorite features but there are a number of others that I’d suggest you look into to see what might suit you best. I hope you found this article useful and that you are as excited as I am about using these features!
#javascript #javascript-development #ecmascript-2020 #es2020