feat: a mortdern way to detect browser

lib/resolvers/http.js

@@ -75,7 +75,7 @@ module.exports = {
   read (file) {
     let u = url.parse(file.url);
 
-    if (process.browser && !u.protocol) {
+    if (typeof window !== "undefined" && !u.protocol) {
       // Use the protocol of the current page
       u.protocol = url.parse(location.href).protocol;
     }

lib/util/url.js

@@ -1,12 +1,13 @@
 "use strict";
 
-let isWindows = /^win/.test(process.platform),
-    forwardSlashPattern = /\//g,
+let forwardSlashPattern = /\//g,
     protocolPattern = /^(\w{2,}):\/\//i,
     url = module.exports,
     jsonPointerSlash = /~1/g,
     jsonPointerTilde = /~0/g;
 
+const isWindows = typeof process !== "undefined" && process.platform === "win32";
+
 // RegExp patterns to URL-encode special characters in local filesystem paths
 let urlEncodePatterns = [
   /\?/g, "%3F",
@@ -45,7 +46,7 @@ exports.resolve = function resolve (from, to) {
  * @returns {string}
  */
 exports.cwd = function cwd () {
-  if (process.browser) {
+  if (typeof window !== "undefined") {
     return location.href;
   }
 
@@ -144,7 +145,7 @@ exports.isHttp = function isHttp (path) {
   }
   else if (protocol === undefined) {
     // There is no protocol.  If we're running in a browser, then assume it's HTTP.
-    return process.browser;
+    return typeof window !== "undefined";
   }
   else {
     // It's some other protocol, such as "ftp://", "mongodb://", etc.
@@ -160,7 +161,7 @@ exports.isHttp = function isHttp (path) {
  * @returns {boolean}
  */
 exports.isFileSystemPath = function isFileSystemPath (path) {
-  if (process.browser) {
+  if (typeof window !== "undefined") {
     // We're running in a browser, so assume that all paths are URLs.
     // This way, even relative paths will be treated as URLs rather than as filesystem paths
     return false;