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You can’t get very far in web development without smacking into JavaScript. It’s the script that powers many front-end web functions like video and audio, search bars, calculators, and real-time chat widgets.

What is JavaScript?

JavaScript is a computer programming language that lets developers add interactivity to websites and applications. It's also widely used in mobile app development, machine learning, and IoT. Unlike other programming languages, JavaScript scripts are written right in the web page's HTML and then automatically run when the page loads.

A key concept: JS objects are key-value pairs with properties and methods. Another important concept is JavaScript's ability to interact with the DOM (Document Object Model) — JavaScript can manipulate DOM by creating and deleting HTML elements, changing their size, and setting their location within the document.

Advantages

JavaScript runs in the browser, making it a versatile client-side scripting language (in contrast to PHP and Ruby, used mainly server-side). It's lightweight and doesn't require a compilation step like Java, using dynamic typing instead. It also supports APIs that allow developers to connect software with other software — for example, displaying a Twitter feed on a webpage.

The biggest disadvantage is that JavaScript can be prone to security issues, since code is interpreted client-side and more vulnerable to exploitation. This is why testing code and hiring professional JS developers is essential for website security. JS can also cause slower performance since it tracks every change made to the page.

Still, the advantages outweigh the drawbacks. Popular sites like Facebook and Google rely heavily on JavaScript for their most interactive features, even if users don't always realize it.

Shopify Development Trends: Most Shopify store owners focus on their digital marketing alongside their web development. Behind the scenes, are Shopify partners such as TheGenieLab. We are helping business owners and shopkeepers to drive continuous improvements through digital marketing services. If you need a hand in any aspect of eCommerce, feel free to reach out to us at wish@thegenielab.com

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The Origins of JavaScript