url: move to module.exports = {} pattern

PR-URL: #12717
Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com

Author: jasnell

lib/url.js

@@ -23,19 +23,19 @@
 
 const{ toASCII }=process.binding('config').hasIntl ?
 process.binding('icu') : require('punycode');
+
 const{ hexTable }=require('internal/querystring');
-constinternalUrl=require('internal/url');
-exports.parse=urlParse;
-exports.resolve=urlResolve;
-exports.resolveObject=urlResolveObject;
-exports.format=urlFormat;
-exports.URL=internalUrl.URL;
-exports.URLSearchParams=internalUrl.URLSearchParams;
-exports.domainToASCII=internalUrl.domainToASCII;
-exports.domainToUnicode=internalUrl.domainToUnicode;
 
+// WHATWG URL implementation provided by internal/url
+const{
+URL,
+ URLSearchParams,
+ domainToASCII,
+ domainToUnicode,
+ formatSymbol
+}=require('internal/url');
 
-exports.Url=Url;
+// Original url.parse() API
 
 functionUrl(){
 this.protocol=null;
@@ -559,7 +559,7 @@ function urlFormat(obj, options) {
 thrownewTypeError('Parameter "urlObj" must be an object, not '+
 (obj===null ? 'null' : typeofobj));
 }elseif(!(objinstanceofUrl)){
-varformat=obj[internalUrl.formatSymbol];
+varformat=obj[formatSymbol];
 returnformat ?
 format.call(obj,options) :
 Url.prototype.format.call(obj);
@@ -1030,3 +1030,18 @@ function encodeAuth(str) {
 returnout+str.slice(lastPos);
 returnout;
 }
+
+module.exports={
+// Original API
+ Url,
+parse: urlParse,
+resolve: urlResolve,
+resolveObject: urlResolveObject,
+format: urlFormat,
+
+// WHATWG API
+URL,
+ URLSearchParams,
+ domainToASCII,
+ domainToUnicode
+};