[msla]

> WHY javascript code is even allowed to see all these actions of the user?

Because the alternative is UI/UX Designers and Visionary Managers insisting on keeping Flash and Java Applets and Microsoft Visual Silverlight .Net++ around forever, because you can't do some things in the browser and We Need To Do Them.

Some things have minimal complexity that either lives in the language itself or in libraries. The Web has minimal bells and whistles that are either implemented in the browsers itself or in plugins.

[king_geedorah]

Nobody “needed” the web to do these things. We decided that the effort and cost of making native applications was too great. I’d argue we went the wrong way given that even the same browser will exhibit slightly different behavior depending upon the underlying platform upon which it runs.