d3-queue 3.0.6

d3-queue.v3.js

@@ -1,4 +1,4 @@
-// https://d3js.org/d3-queue/ Version 3.0.5. Copyright 2017 Mike Bostock.
+// https://d3js.org/d3-queue/ Version 3.0.6. Copyright 2017 Mike Bostock.
 (function (global, factory) {
 	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
 	typeof define === 'function' && define.amd ? define(['exports'], factory) :
@@ -10,7 +10,7 @@ var slice = [].slice;
 var noabort = {};
 
 function Queue(size) {
-  if (!(size >= 1)) throw new Error;
+  if (!((size = +size) >= 1)) throw new Error("invalid size");
   this._size = size;
   this._call =
   this._error = null;
@@ -25,7 +25,8 @@ function Queue(size) {
 Queue.prototype = queue.prototype = {
   constructor: Queue,
   defer: function(callback) {
-    if (typeof callback !== "function" || this._call) throw new Error;
+    if (typeof callback !== "function") throw new Error("invalid callback");
+    if (this._call) throw new Error("defer after await");
     if (this._error != null) return this;
     var t = slice.call(arguments, 1);
     t.push(callback);
@@ -38,13 +39,15 @@ Queue.prototype = queue.prototype = {
     return this;
   },
   await: function(callback) {
-    if (typeof callback !== "function" || this._call) throw new Error;
+    if (typeof callback !== "function") throw new Error("invalid callback");
+    if (this._call) throw new Error("multiple await");
     this._call = function(error, results) { callback.apply(null, [error].concat(results)); };
     maybeNotify(this);
     return this;
   },
   awaitAll: function(callback) {
-    if (typeof callback !== "function" || this._call) throw new Error;
+    if (typeof callback !== "function") throw new Error("invalid callback");
+    if (this._call) throw new Error("multiple await");
     this._call = callback;
     maybeNotify(this);
     return this;