If you ever need to find out which window is active on the OS, you'll definitely want to check this library out! Using native scripts for each operating system, it will allow you to retrieve a string representation of the title of the active window. While not as powerful in the sense that it can't tell you if the process you are running is actually the active one, it will allow you to use regular expressions to detect if there is a match, which is pretty close for now.
var detectActive = require('detect-active-title');
detectActive.getTitle(function(err, title){
// title is the string representation of the active window title
console.log(err, title);
});var detectActive = require('detect-active-title');
detectActive.matchTitle('myapp(\\s+)(-flags)', function(err, match){
// match is true if the active title matches the regular expression string
console.log(err, match);
});Right now this has only been run and tested for OSX Yosemite. Would love feedback or pull-requests to support additional platforms! I'm not a pro native scripter, so improvements to the scripts is also welcome.