- More interactive websites and interfaces, which also extends to web applications. This includes buttons, but also hover-interactivity, menu functionality, animation, and other stapes of the modern web experience.
- Speed, as the language is executed on the user’s device instead of the website’s server. This minimizes server requests, accelerating the user’s experience.
- Reduced server load, as once again the user’s device does most of the heavy lifting, conserving both bandwidth and load.
- Code is relatively easy to learn, write, and debug. Syntax is simple and flexible. It can also be used inside scripts written in other languages.
- Vulnerability to cross-site scripting (XSS) and other types of malicious code injection. Bad actors can potentially alter the code of your legitimate website or web application, which will then execute malicious code on the user’s device. These attacks are often undetected by both the site owner and the user.
- Incompatibility with some older browsers, though this is increasingly of less concerns as these browsers tend not to function at all, thus discouraging their use.