Opera Browsers do not allow users to disable JavaScript. If any website is asking you to enable JavaScript while browsing using any of the Opera mobile browsers, kindly contact the website about the problem.
JavaScript is enabled in all Opera browsers by default and can not be disabled.
Currently, three different types of Mobile Browsers are available by Opera.
Opera Touch is available for both Android and iOS. It is alternative for Safari browser for iPhone users.
Opera for Android comes with built-in ad-blocker and VPN.
Opera Mini is to be used with a slow internet connection. It claims to save up to 90% of data.