JavaScript and programming may seem like a daunting task. But it doesn’t have to be! You can start small and make your way up the ladder, one step at a time. From basic programming techniques to debugging and testing JavaScript, this guide will show you how to build your own JavaScript applications from scratch!
Here are some of the summary points that you will learn:
- What JavaScript is and how it work
- Basic Programming Techniques
- Debugging and Testing Techniques
- Using the Command Line Interface
- Using the Web Browser Developer Tools
- And much more!
What is JavaScript and how does it work?
JavaScript is a programming language that creates interactive experiences with the help of your web browser. It provides users with animations, video games, and even social media platforms. JavaScript isn't an entirely new language; it's actually a scripting language based on the old programming-languages like Java and Perl. if you are finding super keyword in java so you are in right place.
JavaScript can be used in many different ways: to make live streams, run applications, create maps, and animate websites. But its most popular use is in web browsing.
Basic programming techniques
In programming, there are a lot of different ways to create a program. In JavaScript, the most popular way is to start by creating a function. Functions are used to define a block of code that can be run later on. They will always have a name and one or more parameters. For example:
function hello() {
alert(“Hello!”);
}
This function has a name of “hello” and an empty parameter list, which means it doesn't take any input to run. You can call this function like so:
hello(); // this would execute the function defined above
Debugging and testing techniques
Debugging and testing are two important parts of JavaScript. They’re also two of the most difficult tasks to complete correctly, but they can be done!
Understanding the command line interface
The command line interface, often called the CLI, is a program that runs on your terminal. The CLI lets you execute some commands to control the text editor. One of the most common things you would do in the CLI is type in a JavaScript file and run it. This saves you from having to copy and paste your code into the CLI every time you want to test something out.
To create an empty file on your terminal, simply type “touch myfile.js”.
For Windows users, this may be slightly different due to some of the keyboard shortcuts. To create an empty file on your terminal, all you have to do is press “Ctrl + N” or go through File>New>Empty Document
Once you've created an empty file, type in “touch myfile.java”. This will open up a text editor for us so we can start writing some code!
Understanding the web browser developer tools
You may be wondering how to use the web browser developer tools.
1) First, open your favorite text editor and create a new file called hello.js
2) Type in the following: console.log(“Hello, world!”);
3) Save and close the file.
4) Open up your web browser and type in “file:///hello.js” (without quotes).
5) This will load up your hello.js file and you should see “Hello, world!” in your console under the title bar of your web page or in an alert box if you're using Chrome or Firefox.
Conclusion
Now that you know the basics of programming with JavaScript, what’s next?
Now that you know the basics of JavaScript programming, you might wonder how it applies to your profession. One place where you might use JavaScript is to build a website. You can use JavaScript to add interactive features to your website, and you can also use it to add animations and graphics.
You might also find JavaScript in a database management system, and many developers use JavaScript to create mobile apps. If you’re interested in learning more about JavaScript, we have tons of tutorials for you to explore.
