*Introduction to Javascript :
Javascript is the power scripting language of the web. It is a case-sensitive language. It supports all modern web browsers, modern devices. It doesn't need a compiler like Java and C needs. In fact, JavaScript has nothing to do with or is similar to Java. Then why is it known as JavaScript? When JavaScript was released, its first name was called Mocha, it was later renamed to LiveScript, and when Netscape and Sun did a license agreement, its name was changed to JavaScript. There's are many other programming languages, and new more programming languages are being created daily. But there are few powerful programming languages like JavaScript, etc. Javascript is a commonly used and popular language. It is used for creating websites, applications, servers, etc. It is also used in smartwatches. We can learn it easily. It has an open and cross-platform.
*History of Javascript :
Javascript versional name is a live script developed by Netscape corporation later it is later renamed javascript developed by Brendan Eich in 1995. These syntaxes are very close to the "C" programming language. It uses some same ideas which are in Java. In the Indian language, we can read it as Mocha. Its other name is ECMAScript. It was written by Brendan only in 10 days who was working in Netscape communications. JavaScript has versions ES1-ES6; ES1 was its first edition which was launched in 1997. ES2 launched in 1998, ES3 in 1999, ES4 was not launched, ES5 was launched in 2009, Es6 in 2015, then ES6 was updated in 2016, 2017, 2018.
* Advantages and Disadvantages of Javascript;
1. It is a client-side validation purpose.
2. It is used to react to events.
3. It can be used to enter data. 4. It can be used for creating cookies.
5. It is designed with lightweight features.
6. It is open source or cross-platform.
7. It is used in the development of websites.
Like,
-to automatically change a filled-update on any Web.
-to change graphic images.
8. JavaScript code can be added to the HTML site.
9. JavaScript is not solid as Java, Python, C, C++.
10. But there can't be any modern website without JavaScript.
11. We can use JavaScript directly without running HTML.
12. In Javascript, it doesn't allow reading and also writing.
13. It doesn't have the capability of multiprocessing.
14. Anyone can we the code of Javascript.
15. JavaScript has a breakneck processing speed as compared to others.
*Features of Javascript:
Javascript supports the following list of features:
>>Javascript Comments;
Comments are non-executable or Ignore statements using these comments can declare customized statements or user-defined statements within the source code.
Types of Javascript comments:
1] Single line comment;
This comment is restricted to a specific line. These are denoted as "//."
2] Multiline Comment:
This Comment applies to one or more than one line. This is denoted as /* */
>>document write () method;
The write () method writes HTML expressions or javascript code to a document.
>>Java script structure:
As per was standard, javascript has the following detailed structure, which is good.
>>JavaScript semicolon:
In Javascript, every statement ends with a semicolon (;). It is an optional notation.
>>External Javascript:
JavaScript can also be placed in external files. These files contain javascript codes that we apply on the web page.
>>JavaScript blocks:
JavaScript sentences can be group together in blocks. Blocks start with left curly brackets, i.e. { and end with right curly brackets, i.e. }.
>>JavaScript pop-up boxes:
It has three types of popup boxes:
1. Alert Box:
An alert box is often used if you want to make sure information comes through the user. When an alert box pops up, the user will have to click "OK" to proceed.
2.Confirm Box:
It is often used if you want the user to verify and accept something. When a confirm box pops up, the user will have to click either "OK" or Cancel" to proceed. If the user clicks "ok," the box returns true. If the user click cancels, the box returns false.
3. Prompt Box:
It is used if you want the user to input a value before entering a page. When a prompt box pops up, the user will have to click either "OK" or "Cancel" to proceed after entering an input value. If the user clicks "OK," the box returns a value. If the user clicks "Cancel," the box returns null.
>>JavaScript Engine:
the, ooer. These engines are founded in browsers like chrome, Frari, Microsoft, etc., and web servers. V8 is the fastest javascript engine that is used by chro. It converts javascript codes into lower levels which can be understood by the computer. Me.
*CONCLUSION:
Looking digitally, JavaScript is used everywhere in creating sites, servers, or any application because it's very faster, lighter than other programming languages. JavaScript is supported by all major browsers. It has full integration with HTML and CSS. Java Script is the heart, liver, kidney, and brain of your website. It helps in the functioning of the website. But java script is not the only language that can do that. Many other languages can do that, not many to be exact. We can't say that JavaScript is better than all other programming languages because it has some disadvantages. It doesn't have the capability of multiprocessing and can't be used for networking applications. Every processing language has its advantages and limitations. So, We can't say this is better than others. JavaScript is used in almost 95% of websites. Its programming is based on text from the client and server-side. In Javascript, HTML gives structure, and CSS gives style to web pages.
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