Priority Queue (NodeJS) 
It's a simple implementation of a PriorityQueue for NodeJS. As the code is JavaScript it could be used on the browser without any trouble.
The basic usage is to push() elements and give them a priority to be used into the queue. You can also set a custom compare() function and a limit of elements to be held into the queue.
More examples can be found into the tests folder.
queue = new PriorityQueue();
queue.push("Most important note", 99);
queue.push("Important note", 50);
queue.push("Silly notice", 1);
queue.top(); // Most important note
queue.top(); // Important note
queue.top(); // Silly notice
queue.top(); // undefined