stack-track

Tracks the state of a stack, and raises events when it changes.

Usage

Install:

npm install stack-track

Use:

// Instanciate
var tracker = new StackTracker();

// Bind to events
tracker.on('push', eventHandler);
tracker.on('remove', eventHandler);
tracker.on('top', eventHandler);
tracker.on('empty', eventHandler);

// Push an item onto the stack
var removeA = tracker.push('a');

// Remove a previously pushed item.
removeA();

Events

push

Raised when any item is pushed onto the stack. The pushed item is passed to the handler.

remove

Raised when any item is removed from the stack. The removed item is passed to the handler.

top

Raised when there is a different last item in the stack to the last time the top event was raised. The last item is passed to the handler.

empty

Raised when the stack is empty. Nothing passed to the handler.