JavaScript is a vulnerability that allows hackers to inject client-side script into web pages that are viewed by other users. In the past, it’s accounted for as much as 84 percent of all security vulnerabilities on the internet. Javascript and Javascript are two different things, languages and are used differently. Javascript is used for web sites, you can disable Javascript as well in your browser preferences settings. While I understand that most people don’t have realistic security concerns, some of us are important and have things of value to lose.”]
Source: https://gizmodo.com/why-are-javascript-attacks-so-dangerous-1453269240