URLSearchParams : [err] keys is not a function

polyfills/URL/config.toml

@@ -10,9 +10,10 @@ aliases = [
 dependencies = [
   "Object.defineProperties",
   "Array.prototype.forEach",
-  "Array.isArray"
+  "Array.isArray",
+  "Array.from"
 ]
-notes = [ "Polyfill requires Object getters so fails in IE < 8" ]
+notes = [ "Polyfill requires Object getters so fails in IE <= 8" ]
 license = "CC0-1.0"
 repo = "https://github.com/inexorabletash/polyfill"
 docs = "https://developer.mozilla.org/en-US/docs/Web/API/URL"

polyfills/URL/detect.js

@@ -17,11 +17,27 @@
 			if (url.href === 'http://example.com/?a=1&b=2') {
 				url.search = '';
 				if (url.href === 'http://example.com/') {
+					if (!('sort' in global.URLSearchParams.prototype)) {
+						return false
+					}
+
 					var sp1 = new global.URLSearchParams('a=1');
 					var sp2 = new global.URLSearchParams(sp1);
-					if (String(sp2) === 'a=1') {
-						return true;
+					if (String(sp2) !== 'a=1') {
+						return false;
+					}
+
+					var sp3 = new global.URLSearchParams({a: '1'});
+					if (String(sp3) !== 'a=1') {
+						return false;
 					}
+
+					var sp4 = new global.URLSearchParams([['a', '1']]);
+					if (String(sp4) !== 'a=1') {
+						return false;
+					}
+
+					return true;
 				}
 			}
 		}

polyfills/URL/polyfill.js

@@ -17,10 +17,6 @@
     return false;
   }
 
-  function toArray(iter) {
-    return ('from' in Array) ? Array.from(iter) : Array.prototype.slice.call(iter);
-  }
-
   (function() {
 
     // Browsers may have:
@@ -112,9 +108,9 @@
         // In ES6 init would be a sequence, but special case for ES5.
         this._list = urlencoded_parse(String(init));
       } else if (typeof init === 'object' && isSequence(init)) {
-        toArray(init).forEach(function(e) {
+        Array.from(init).forEach(function(e) {
           if (!isSequence(e)) throw TypeError();
-          var nv = toArray(e);
+          var nv = Array.from(e);
           if (nv.length !== 2) throw TypeError();
           $this._list.push({name: String(nv[0]), value: String(nv[1])});
         });
@@ -505,9 +501,9 @@
     global.URLSearchParams = function(init) {
       if (init && typeof init === 'object' && isSequence(init)) {
         var o = new orig();
-        toArray(init).forEach(function(e) {
+        Array.from(init).forEach(function (e) {
           if (!isSequence(e)) throw TypeError();
-          var nv = toArray(e);
+          var nv = Array.from(e);
           if (nv.length !== 2) throw TypeError();
           o.append(nv[0], nv[1]);
         });