Current Dev State

static/js/ketcher2/node_modules/timers-ext/once.js

@@ -0,0 +1,41 @@
+// It's actually "debounce"
+
+'use strict';
+
+var callable     = require('es5-ext/object/valid-callable')
+  , nextTick     = require('next-tick')
+  , validTimeout = require('./valid-timeout')
+
+  , apply = Function.prototype.apply;
+
+module.exports = function (fn/*, timeout*/) {
+	var scheduled, run, context, args, delay, timeout = arguments[1], handle;
+	callable(fn);
+	if (timeout == null) {
+		delay = nextTick;
+	} else {
+		timeout = validTimeout(timeout);
+		delay = setTimeout;
+	}
+	run = function () {
+		if (!scheduled) return; // IE8 tends to not clear immediate timeouts properly
+		scheduled = false;
+		handle = null;
+		apply.call(fn, context, args);
+		context = null;
+		args = null;
+	};
+	return function () {
+		if (scheduled) {
+			if (handle == null) {
+				// 'nextTick' based, no room for debounce
+				return;
+			}
+			clearTimeout(handle);
+		}
+		scheduled = true;
+		context = this;
+		args = arguments;
+		handle = delay(run, timeout);
+	};
+};