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A simple JS program is as follows:
<p id="demo">I will change once you Click! the button...</p>
<button type="button" onclick='document.getElementById("demo").innerHTML = "Hello Beautiful!"'>Click!</button>
- High performance: JS is lightweight & fast as it can be immediately run on the browser (client machine)
- Simple and popular: We have been using it for ages, and it hasn’t lost the hold!
- Interoperable: can be used with a variety of other languages and applications
- Reduces server load as it works on the client-side
- Makes pages lively, dynamic, and rich
- It comes with many free tools to enhance functionality
- The functionality of JS can be extended to the backend using Node.js
You can install an IDE or use code editors, or even use notepad or Textpad to write JS code. IDEs and editors provide intuitive programming experience and faster results than programming with editors like notepad, where you have to type everything from scratch.
Although you can type and run a JS program with a notepad, an IDE makes it easy to debug the code and provide support to ALM (Application Lifecycle Management) systems. Here are the top 3 IDEs/source-code editors:
- WebStorm: WebStorm provides smart assistance and code completion, refactoring for CSS, TypeScript, JS. You can test your functionality and troubleshoot with the built-in debugger that targets both Node.js and client-side code. Use the 30-day trial version to get the feel of the product before you go for buying it.
- Visual Studio Code: There is literally no language that VS Code doesn’t support. It is a free, developer-friendly cross-platform IDE that offers features like built-in Git integration, smart code completion, code debugging from the editor itself, and much more. It is highly extensible.
- Atom: Atom is a highly popular IDE from GitHub. It provides smart context-based code completion, easy code navigation, a full set of diagnostic tools to understand and debug code, and many more features. It is free and open-source, and you can add some fun to your coding using the pre-installed themes and styles.
AWS Cloud9: Apart from JS, AWS Cloud9 also supports development for C, C++, Perl, Python, Node.js, etc. It is entirely written in JS, and the backend is in Node.js. It is an online open-source IDE, and one needs an AWS account to get access. Some features are syntax highlighting, support for npm and basic UNIX commands, simultaneous editing, real-time language analysis, and customizable key bindings.
Apart from the paid and free tutorials mentioned above, here are some more free video and blog links that will get you started:
- Difference between attributes and property?
- Can you differentiate between let and var?
- Explain the difference between function declaration and function expression?
- In how many ways can you create an array in JS?
- Please explain Self Invoking Function and its syntax.
- Could you explain escape() and unescape() functions?
- JS is used for client as well as server-side programming and is an interpreted language, which means no additional compiler is required
- You can simply type JS code inside any HTML file using the <script> tag and make it work by opening it in a browser
- To learn JS, you should also learn HTML and CSS
- Learn through courses, tutorials, projects, and then take up certifications to test your knowledge and learn industry-level skills too.
- Interview questions will help you understand the latest industry requirements
- Practice is the key to learning JS
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