As we all know JS stands for JavaScript.

It is a lightweight, cross-platform, an interpreted scripting language. It is well-known for the development of web pages, many non-browser environments also use it.

JavaScript can be used for Client-side developments as well as Server-side developments. JavaScript contains a standard library of objects, like Array, Date, and Math, and a core set of language elements like operators, control structures, and statements.

JS version release year chart:

JS Structure:

<script type="text/javascript">  
    // Your javaScript code 
</script>

Characteristics of JS:

• Dynamically typed languages: This language can receive different data types over time.
• Case Sensitive Format: JavaScript is case sensitive so you have to aware of that.
• Light Weight: It is so lightweight, and all the browsers are supported by JS.
• Handling: Handling events is the main feature of JS, it can easily response on the website when the user tries to perform any operation.
• Interpreter Centered: Java Script is built with interpreter centered that allows the user to get the output without the use of the compiler.

Advantages of JS:

• JavaScript executed on the user’s browsers not on the webserver so it saves bandwidth and load on the webserver.
• The JavaScript language is easy to learn it offers syntax that is close to the English language.
• In javaScript, if you ever need any certain feature then you can write it by yourself and use an add-on like Greasemonkey to implement it on the web page.
• It doe’s not require compilation process so no compiler is needed user’s browsers do the task.
• JavaScript is easy to debug, and there are lots of frameworks available that you can use and become master on that.

Disadvantages of JS:

• JavaScript codes are visible to the user so the user can place some code into the site that compromises the security of data over the website. That will be a security issue.
• All browsers interpret JavaScript that is correct but they interpret differently to each other.
• It only supports single inheritance, so in few cases may require the object-oriented language characteristic.
• A single error in code can totally stop the website’s code rendering on the website.
• JavaScript stores number as a 64-bit floating-point number but operators operate on 32-bit bitwise operands.

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