JavaScript’s window.matchMedia (vs resize event listeners)

It can be quite common when working with web apps to need to use Javascript to check for window resizes.

The typical way is to use an event listener on window’s resize event, such as:

function checkForWindowResize() {
    console.log(`Screen width: ${window.innerWidth}`);

    if (window.innerWidth < 600) {
       doSomethingForSmallScreens();
    }
    else {
       doSomethingForLargeScreens();
    }
}

window.addEventListener('resize', checkForWindowResize);

However, this will mean that the checkForWindowResize function will fire every time the window is resized, at every pixel increment/decrement.

This can have huge performance issues if the event listener function is slow to run.

It is quite common that you don’t need all of those events - you only care if it was resized smaller or larger than a certain size.

In those cases there is a nicer alternative where you can use css media query breakpoints. This won’t be suitable for all uses of adding an event listener to the resize event, but it is very useful in many situations.

#javascript #programming #developer

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JavaScript’s window.matchMedia (vs resize event listeners)

It can be quite common when working with web apps to need to use Javascript to check for window resizes.

The typical way is to use an event listener on window’s resize event, such as:

function checkForWindowResize() {
    console.log(`Screen width: ${window.innerWidth}`);

    if (window.innerWidth < 600) {
       doSomethingForSmallScreens();
    }
    else {
       doSomethingForLargeScreens();
    }
}

window.addEventListener('resize', checkForWindowResize);

However, this will mean that the checkForWindowResize function will fire every time the window is resized, at every pixel increment/decrement.

This can have huge performance issues if the event listener function is slow to run.

It is quite common that you don’t need all of those events - you only care if it was resized smaller or larger than a certain size.

In those cases there is a nicer alternative where you can use css media query breakpoints. This won’t be suitable for all uses of adding an event listener to the resize event, but it is very useful in many situations.

#javascript #programming #developer

Understand JavaScript Event Listeners

You will be using events in almost every web app that you build. Therefore it is important to understand the basics of JavaScript events.

Understanding JavaScript Event Listeners

After watching this video you will have an understanding of event listeners - how to add them, remove them. Grasp advanced concepts such as bubbling and capturing. What is the event object? How does event propagation occur and how prevent the default behaviour of an event.

#javascript #event #event-listener #html5 #dom #web-development

Java Vs. JavaScript: Know the Difference

What a mess it could be to share the same name — especially if you are a programming language. Even if you are already over 20 years old, IT newbies periodically confuse you with your namesake. This happens all the time with Java and JavaScript, although they are not related at all! As someone on the internet said. They correlate in much the same way as a car and a carpet.

Why do these two languages have such similar names? How do they differ from each other, and what else do they have in common? This article will provide the answers to these questions.

In the Beginning, It Was Java

The Same Year, A Little Bit Later: Meet JavaScript!

Technical Differences Between Java and JavaScript

What Can You Build in Java and JavaScript?

…

#java #javascript #javascript-development #java-development #learn-to-code-java #learn-javascript #programming #java-vs-javascript

Java vs. JavaScript: Know The Difference

Java vs. JavaScript

#java #javascript #Java vs. JavaScript #Java vs JavaScript #programming

What is JavaScript - Stackfindover - Blog

Who invented JavaScript, how it works, as we have given information about Programming language in our previous article ( What is PHP ), but today we will talk about what is JavaScript, why JavaScript is used The Answers to all such questions and much other information about JavaScript, you are going to get here today. Hope this information will work for you.

Who invented JavaScript?

JavaScript language was invented by Brendan Eich in 1995. JavaScript is inspired by Java Programming Language. The first name of JavaScript was Mocha which was named by Marc Andreessen, Marc Andreessen is the founder of Netscape and in the same year Mocha was renamed LiveScript, and later in December 1995, it was renamed JavaScript which is still in trend.

What is JavaScript?

JavaScript is a client-side scripting language used with HTML (Hypertext Markup Language). JavaScript is an Interpreted / Oriented language called JS in programming language JavaScript code can be run on any normal web browser. To run the code of JavaScript, we have to enable JavaScript of Web Browser. But some web browsers already have JavaScript enabled.

Today almost all websites are using it as web technology, mind is that there is maximum scope in JavaScript in the coming time, so if you want to become a programmer, then you can be very beneficial to learn JavaScript.

JavaScript Hello World Program

In JavaScript, ‘document.write‘ is used to represent a string on a browser.

<script type="text/javascript">
	document.write("Hello World!");
</script>

How to comment JavaScript code?

• For single line comment in JavaScript we have to use // (double slashes)
• For multiple line comments we have to use / * – – * /

<script type="text/javascript">

//single line comment

/* document.write("Hello"); */

</script>

Advantages and Disadvantages of JavaScript

#javascript #javascript code #javascript hello world #what is javascript #who invented javascript