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Stuk / promise-debug.js

Last active October 2, 2016 21:39

I've found this code useful for debugging promises, to find what order things are happening in. `console.error` gives a stack trace in the Webkit Developer Tools which makes easily narrow down where the promise creation and resolution is happening.

	var Q = require("q");
	var Set = require("collections/set"); // https://npmjs.org/package/collections

	window.outstandingPromises = new Set();
	var originalDefer = Q.defer;
	Q.defer = function () {
	console.error("Deferred created");
	var deferred = originalDefer();
	deferred.stack = new Error("").stack;
	window.outstandingPromises.add(deferred);