What is JavaScript and why it is used? All Information Discussion
However, to put it simply, we can say that JavaScript is not a basic programming language but a scripting language. It is mainly used in browsers and is only used with HTML or CSS. It has many features that we will cover in this article.
Often people do not know the difference between JavaScript and Java and both start thinking the same. But it is not one at all. These two languages are completely different.
So today I thought, I will give you complete information about using JavaScript and its benefits, then you will not have any hesitation. And don't be late, don't know about JavaScript.
Index:
What is JavaScript?
What is the framework of JavaScript?
Introduction to JavaScript
The difference between Java and JavaScript
How to enable JavaScript
In Google Chrome
In Internet Explorer
Mozilla in Firefox
In the opera
Apple Safari
What is JavaScript Language?
Advantages and disadvantages of JavaScript
Today's JavaScript
Conclusion
What is JavaScript?
JavaScript is a very widely used client-side scripting language. Or we can say that it is used in all major web browsers. It has the largest library ecosystem in any programming language. Since it is a scripting language, its code can also be written on an HTML page.
So when a user requests that a JavaScript is present for the HTML page, this script is sent to the browser and it depends on what it wants to do with the browser.
However, JavaScript has nothing to do with Java. The JavaScript is called because of the use of the Java name. But the two are completely different.
JavaScript official name is defined under ECMAScript standard ECMA-262.
What is the framework of JavaScript?
The most frequently used frameworks are React JS, Angular JS, JST, JQuery, NodeJS etc.
Introduction to JavaScript:
JavaScript is one of the 3 languages that all web developers must learn, let's also learn about those three languages.
1. HTML is used to define the content of web pages.
2. CSS is used to specify the layout of web pages.
3. JavaScript is used to treat web pages.
Web pages are not just where JavaScript is used. JavaScript is used in many desktop and server programs.
The difference between Java and JavaScript:
Often people think that there is no difference between Java and JavaScript. But in reality there are many differences between the two. So let's find out the difference between the two.
However, the names of these two are swaying too much, which creates suspicion in the minds of people. While this language is primarily used as a scripting language on HTML pages, Java is a real programming language that is used exclusively for other purposes.
Learning Java can be a bit difficult. It was created by Sun Microsystems for use in all cases where the computer needed power.
JavaScript was developed by Brendan Ich, who was working on Netscape at the time, based on the client-side scripting language (although it cannot be used for any basic reason due to its server side environment)
Originally the name of this language was LiveScript, but Java was very popular when it was published. Therefore, finally we changed the name of Netscape to "JavaScript".
Java and JavaScript are both native to C and C ++, but these languages work in completely different ways from their ancestors. Both languages are yes object oriented and they also share some similar syntax. However, there are some more differences compared to the mill.
How to enable JavaScript:
At the moment almost all web pages have JavaScript, a scripting programming language that runs in the viewer's web browser.
It makes web pages functional for a specific purpose, but if it is disabled for some reason, the content of the web page or its functionality is also limited or unavailable.
So let's find out how to enable JavaScript in different browsers: -
In Google Chrome-
1. In the menu of your web browser, click "Customize and control Google Chrome" and select "Settings".
2. In the "Settings" section, click "Show advanced settings ...".
3. Click "Content Settings" under "Privacy."
4. When the dialog window opens, you can search the "Javascript" section and select "Allow all sites to run Javascript (recommended)".
5. Then click the "OK" button to turn it off.
6. Then close the "Settings" tab.
7. Click the "Reload this page" button in your web browser to refresh the page.
In Internet Explorer-
1. In the Web browser menu, click the Tools icon and select "Internet Options".
2. In the "Internet Options" window, select the "Security" tab.
3. Click the "Custom Layers" button on the "Security" tab.
4. You will need to go to the "Scripting" section to open the "Security Settings - Internet Zone" dialog window.
5. Select "Enable" in the "Active Scripting" item.
6. It does, a "Warning!" A window pops up where it will ask "Are you sure you want to change this setting for this region?" Select "Yes".
7. Click the "OK" button to turn it off in the "Internet Options" window.
8 . Then click the "Refresh" button with the web browser so that the page will refresh again.
In Mozilla Firefox-
1. In the address bar, type: Configure and press Enter.
2. Click 'Be careful, I promise'. You may receive a warning message.
3. While in the search box, search for JavaScript
4. Then toggle the "JavaScript enabled" choice (right click and select "Toggle" or double-click the choice) which you can change its value from "False" to "True".
5. Click the "Reload current page" button with the web browser from which you can refresh the page.
In Opera-
1. Click the Opera icon "Menu" and then "Settings".
2. Click "Websites" and then "Allow all sites to run JavaScript.
3. Click the "Reload" button to refresh that page in a web browser.
Apple Safari-
1. Click "Edit" in your web browser menu and select "Preferences".
2. Select the "Security" tab in the "Preferences" window.
3. Next, check the "Enable JavaScript" checkbox in the "Web Content" section of the "Security" tab.
4. Click the "Reload Current" button in the web browser to refresh the page.
What is JavaScript language?
JavaScript is not a programming language only if we speak in a strict sense. Rather it is a scripting language because it is managed by directing the browser in the background.
If you order an image to be replaced with another, JavaScript asks the browser to do so. The browser actually does all the work, so all you have to do is write some code in this scripting language so that the browser can do all your work.
This is why JavaScript is a very simple language for primary education.
Advantages and disadvantages of JavaScript:
Like other computer languages, JavaScript has its advantages and disadvantages. Where previously it was limited to only a few works, nowadays it is used in many works.
Advantages of JavaScript:
1. Speed: Client-side JavaScript is very fast because it runs instantly in client-side browsers. JavaScript remains completely unaffected from network calls to the backend server as long as external resources are required.
It does not need to be compiled for the client, so it gives some speed advantage.
2. Simplicity: JavaScript is very easy to implement as well as easy to learn.
3. Popularity: JavaScript is used across the web. In addition, there are many resources on the Internet to learn it. Stack over flow and GitHub are two great websites where you can learn everything about JavaScript.
4. Interoperability: JavaScript is easily compatible with other languages, it is being used in many applications. Unlike PHP and SSI scripts, JavaScript can easily go to any web page.
JavaScript can also be used in other scripts written in different languages, such as Parv and PHP.
5. Server load: Because they are used on the client side, the demand for website servers decreases.
6. Rich Interface: Being a drag or drop element or slider, it gives your website a rich interface.
7. Versatility: JavaScript is now being used on many servers. JavaScript is used on the front-end of the client server, as well as the entire JavaScript app can now be created with the help of JavaScript.
Problems with JavaScript:
1. Client-side protection: Since this code is executed from the user's computer, in some cases it can also be used for malicious purposes. This is the main reason why some people prefer to disable JavaScript.
2. Browser Support: JavaScript is sometimes interpreted differently in different browsers which differ from one another. While server-side scripts always generate the same type of output, the output of client-side scripts is slightly predictable.
However, this is not a big problem because as long as they are working properly in big and popular browsers, everything is safe.
Today's JavaScript:
Nowadays, these scripts are popular everywhere - it's the most widely used client-side scripting language. JavaScript is written in HTML documents and it enables interaction with other web pages in a very unique way.
For example, it's just JavaScript that allows me to automatically schedule appointments and play online games.
Note: New developments like JS allow it to be used in server-side APIs like HTML5 that allow the user to control the media and other device features.
Conclusion:
I hope you liked this article. I have always tried to provide readers with complete information about the differences between Java and JavaScript, so that they do not have to search other sites or the Internet in the context of their articles.