JavaScript is a high-level interpreted programming language which is extensively used in web development. HTML, CSS and JavaScript are the three main components of a webpage. JavaScript allows us to make dynamic interactive web-pages. In this tutorial we are going to learn how to add JavaScript to a HTML file.

Open your Html file, we have a simple Html web page with a single button.

When we open this HTML file in the browser, we see the button with the text click me.

The button doesn’t do anything when its clicked. We can use JavaScript to change the behaviour of this button. We will use script tags to insert JavaScript code in the html file. We will place the script tags in theof the HTML page. We can place scripts tags in the,section or both.

We will add the code between the script tags. The type attribute is not required now. Old JavaScript examples often use the type attribute. JavaScript is now the default scripting language in HTML.

We defined an event for the button when the button is clicked it will invoke the function that we defined in between the script tags. The function causes an alert popup with the provided text to appear on the screen whenever the button is placed.

We can put the JavaScript code on another file with the extension ‘.js’ and call the function from the HTML file by using src (source) attribute of the <script> tag. This allows for modularity and reusability of code.

We created a new file jscode.js and copied the function in it.

We then changed the script tag, removed the code inside it and inserted the src attribute.

Now we can make changes in the JavaScript (.js) file without having to edit the HTML file.

How do I add JavaScript to my website?

To insert JavaScript into a web page, use the <script> tag. You should use the type attribute to specify the type of script being used, which in the case of JavaScript is text/javascript . It is also possible to the language attribute to say what JavaScript version you are using.

Can we write JavaScript in HTML body?

JavaScript in body or head: Scripts can be placed inside the body or the head section of an HTML page or inside both head and body. To use an external script put the name of the script file in the src attribute of a script tag. External scripts cannot contain script tags.

What is JavaScript example?

Javascript example is easy to code. JavaScript provides 3 places to put the JavaScript code: within body tag, within head tag and external JavaScript file. Let’s create the first JavaScript example. The script tag specifies that we are using JavaScript.

What is JavaScript in HTML?

JavaScript is the Programming Language for the Web. JavaScript can update and change both HTML and CSS. JavaScript can calculate, manipulate and validate data.

Is JavaScript front end or backend?

JavaScript is used in both Back End and Front End Development. JavaScript is used across the web development stack. That’s right: it’s both front end and backend.

Where do we use JavaScript in HTML?

JavaScript is a text-based programming language used both on the client-side and server-side that allows you to make web pages interactive. Where HTML and CSS are languages that give structure and style to web pages, JavaScript gives web pages interactive elements that engage a user.

Is JavaScript hard to learn?

JavaScript isn’t exactly hard to learn, but if it’s your first programming language adjusting to the mindset required for programming can take a lot of time. JavaScript is actually one of the easier programming languages to start with. In fact, there are several resources available to help you learn it with ease.

Is JavaScript harder than Python?

JavaScript is harder than Python, even though they both are dynamically typed, easy to learn syntaxes and with several built in functions, Python is overall better when compared to JavaScript because it is simpler and is easier to use.

Why is JavaScript so bad?

javascript is dynamically and loosely typed, which is bad for application reliability. javascripts prototypical inheritance is strange compared to the usual class inheritance. javascripts prototypical inheritance is strange compared to canonical examples like self.

Is JavaScript harder than Java?

It is much easier and more robust than Java. It allows for fast creation of web page events. Many JavaScript commands are what are known as Event Handlers: They can be embedded right into existing HTML commands. JavaScript is a little more forgiving than Java.

Is Java a dying language?

Of course Java is not dead – it will not die for dozens of years – but the world is quickly shifting to JavaScript and Node. js. And there are many good, technical reasons for doing so.

What pays more Java or JavaScript?

The US. Obviously, the United States is the most expensive country in terms of software development services. For instance, the average annual Java developer salary here is $ 104,663, on the other hand, JavaScript developers receive approximately $ 105,744 per year.

Should I learn Java first or JavaScript?

While Java and C++ as are usually recommended first languages on universities, they’re considerably harder to learn than JavaScript.

Can I learn JavaScript without knowing Java?

Java is a programming language, its much more complex + compiling + object oriented. JavaScript, is a scripting language, it’s usually much simpler, no need to compile stuff, and code is easily seen by anyone viewing the application. On the other hand, if you want to start with something easy, go for javascript.

Should I learn Java or JavaScript or Python?

If you want to eventually go into any of these areas, learning Python is a much better option. On the other hand, JavaScript has the advantage of being both a front-end and a backend language. Python is mainly a backend language restricted to the server side.

Is Python or JavaScript better?

Hands down, JavaScript is undeniably better than Python for website development for one simple reason: JS runs in the browser while Python is a backend server-side language. While Python can be used in part to create a website, it can’t be used alone. JavaScript is the better choice for desktop and mobile websites.

Can Python replace JavaScript?

Brython is designed to replace Javascript as the scripting language for the Web. As such, it is a Python 3 implementation (you can take it for a test drive through a web console), adapted to the HTML5 environment, that is to say with an interface to the DOM objects and events.

Will learning JavaScript get me a job?

Basically, yes, if you know JS and whatever framework the company you’re applying to uses, you can get a job, but if it’s your first job they might expect to give you a decent amount of hands-on training for the first 3-6 months or so.