Difference between JavaScript and TypeScript

JavaScript vs TypeScript

JavaScript is the most popular and used programming language in Web development. TypeScript is a superset of JavaScript and is getting popularity when building Web applications. While TypeScript is a superset of JavaScript, it brings many benefits for software developers that can help them build Web apps faster and in more organized way. In this blog, let’s see the difference between TypeScript and JavaScript and compare JavaScript and TypeScript features.

JavaScript

JavaScript is the most popular programming language for Web development. JavaScript also known as JS is a high-level interpreted scripting programming language that is used in Web development. Unlike other popular programming languages that use a compiler to compile the language, JavaScript uses an interpreter to convert JavaScript to machine code.

JavaScript’s proposal was designed by Brendan Eich in 10 days in May 1995. The first official name of JavaScript was LiveScript and was shipped in Netscape Navigator 2.0. JavaScript originally managed by Netscape is currently managed by Mozilla Foundation. In 1997, JavaScript was accepted by ECMA International and became a standard. The current version of JavaScript is ECMAScript 2019.

Characteristics

Here are the key characteristics of JavaScript:

1. JavaScript is a high-level scripting programming language.
2. JavaScript is a multi-paradigm programming language and supports event-driven, functional, and imperative programming styles. Structured programming syntax in JavaScript is similar to C language and supports common statements including if statement, while loops, switch statements and do while loop.
3. While JavaScript majorly runs on the client-side in the user’s browser, but it can run on the server-side and today there are several JavaScript-based libraries and frameworks are available.
4. JavaScript combined with HTML and CSS makes a majority of the Web pages on the Web. While HTML and CSS combo is used to build Web pages (user interfaces), JavaScript is used for functional coding.
5. Majority of the Web browsers including Google Chrome, Microsoft Edge, Apple Safari, and Mozilla Firefox fully support JavaScript.
6. JavaScript is a dynamically typed language that means the type of an object or variable is decided at runtime and the same variable can be used to store different types and values.
7. While JavaScript is not a fully object-oriented programming language but is almost objects-oriented. JavaScript has concepts of objects, properties, and functions. Inheritance in objects is supported via prototypes.
8. Function is a first-class member of JavaScript. That means, a function is considered to be an object and can have its own properties and methods.

#typescript #javascript

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Learn Object Key iteration in JavaScript and TypeScript

Looping through an object by its keys is a common task for many #JavaScript developers. In this lesson we discuss why your assumptions can break when migrating your code to #TypeScript and a quick fix you can use if you trust you code completely 🌹

#typescript #javascript 

The Definitive Guide to TypeScript & Possibly The Best TypeScript Book

TypeScript Deep Dive

I've been looking at the issues that turn up commonly when people start using TypeScript. This is based on the lessons from Stack Overflow / DefinitelyTyped and general engagement with the TypeScript community. You can follow for updates and don't forget to ★ on GitHub 🌹

Reviews

• Thanks for the wonderful book. Learned a lot from it. (link)
• Its probably the Best TypeScript book out there. Good Job (link)
• Love how precise and clear the examples and explanations are! (link)
• For the low, low price of free, you get pages of pure awesomeness. Chock full of source code examples and clear, concise explanations, TypeScript Deep Dive will help you learn TypeScript development. (link)
• Just a big thank you! Best TypeScript 2 detailed explanation! (link)
• This gitbook got my project going pronto. Fluent easy read 5 stars. (link)
• I recommend the online #typescript book by @basarat you'll love it.(link)
• I've always found this by @basarat really helpful. (link)
• We must highlight TypeScript Deep Dive, an open source book.(link)
• Great online resource for learning. (link)
• Thank you for putting this book together, and for all your hard work within the TypeScript community. (link)
• TypeScript Deep Dive is one of the best technical texts I've read in a while. (link)
• Thanks @basarat for the TypeScript Deep Dive Book. Help me a lot with my first TypeScript project. (link)
• Thanks to @basarat for this great #typescript learning resource. (link)
• Guyz excellent book on Typescript(@typescriptlang) by @basarat (link)
• Leaning on the legendary @basarat's "TypeScript Deep Dive" book heavily at the moment (link)
• numTimesPointedPeopleToBasaratsTypeScriptBook++; (link)
• A book not only for typescript, a good one for deeper JavaScript knowledge as well. link
• In my new job, we're using @typescriptlang, which I am new to. This is insanely helpful huge thanks, @basarat! link
• Thank you for writing TypeScript Deep Dive. I have learned so much. link
• Loving @basarat's @typescriptlang online book basarat.gitbooks.io/typescript/# loaded with great recipes! link
• Microsoft doc is great already, but if want to "dig deeper" into TypeScript I find this book of great value link
• Thanks, this is a great book 🤓🤓 link
• Deep dive to typescript is awesome in so many levels. i find it very insightful. Thanks link
• @basarat's intro to @typescriptlang is still one of the best going (if not THE best) link
•  
• This is sweet! So many #typescript goodies! link

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#typescript #opensource 

TypeScript option you want to enable beyond strict : noUncheckedIndexedAccess

strict (and its sub flag strictNullChecks) can really help prevent null and undefined errors in your runtime #JavaScript. However, it doesn't defend against invalid array and object access.

In this lesson we look at a flag that protects against rogue undefined that might end up in your #TypeScript if this flag is not enabled 

#typescript #javascript 

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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