7 files changed, 147 insertions, 3 deletions
diff --git a/js/dom_types.ts b/js/dom_types.ts
index 0c6814dae..651eece9a 100644
--- a/js/dom_types.ts
+++ b/js/dom_types.ts
@@ -536,3 +536,73 @@ export interface Response extends Body {
   /** Creates a clone of a `Response` object. */
   clone(): Response;
 }
+
+export interface Location {
+  /**
+   * Returns a DOMStringList object listing the origins of the ancestor browsing
+   * contexts, from the parent browsing context to the top-level browsing
+   * context.
+   */
+  readonly ancestorOrigins: string[];
+  /**
+   * Returns the Location object's URL's fragment (includes leading "#" if
+   * non-empty).
+   * Can be set, to navigate to the same URL with a changed fragment (ignores
+   * leading "#").
+   */
+  hash: string;
+  /**
+   * Returns the Location object's URL's host and port (if different from the
+   * default port for the scheme).  Can be set, to navigate to the same URL with
+   * a changed host and port.
+   */
+  host: string;
+  /**
+   * Returns the Location object's URL's host.  Can be set, to navigate to the
+   * same URL with a changed host.
+   */
+  hostname: string;
+  /**
+   * Returns the Location object's URL.  Can be set, to navigate to the given
+   * URL.
+   */
+  href: string;
+  /** Returns the Location object's URL's origin. */
+  readonly origin: string;
+  /**
+   * Returns the Location object's URL's path.
+   * Can be set, to navigate to the same URL with a changed path.
+   */
+  pathname: string;
+  /**
+   * Returns the Location object's URL's port.
+   * Can be set, to navigate to the same URL with a changed port.
+   */
+  port: string;
+  /**
+   * Returns the Location object's URL's scheme.
+   * Can be set, to navigate to the same URL with a changed scheme.
+   */
+  protocol: string;
+  /**
+   * Returns the Location object's URL's query (includes leading "?" if
+   * non-empty). Can be set, to navigate to the same URL with a changed query
+   * (ignores leading "?").
+   */
+  search: string;
+  /**
+   * Navigates to the given URL.
+   */
+  assign(url: string): void;
+  /**
+   * Reloads the current page.
+   */
+  reload(): void;
+  /** @deprecated */
+  reload(forcedReload: boolean): void;
+  /**
+   * Removes the current page from the session history and navigates to the
+   * given URL.
+   */
+  replace(url: string): void;
+}
diff --git a/js/globals.ts b/js/globals.ts
index e0fa6ef12..935890be4 100644
--- a/js/globals.ts
+++ b/js/globals.ts
@@ -58,6 +58,8 @@ window.clearInterval = timers.clearTimer;
 window.console = new consoleTypes.Console(libdeno.print);
 window.setTimeout = timers.setTimeout;
 window.setInterval = timers.setInterval;
+// tslint:disable-next-line:no-any
+window.location = (undefined as unknown) as domTypes.Location;
 
 // When creating the runtime type library, we use modifications to `window` to
 // determine what is in the global namespace.  When we put a class in the
diff --git a/js/lib.web_assembly.d.ts b/js/lib.web_assembly.d.ts
index a5747b30e..1ec6a7943 100644
--- a/js/lib.web_assembly.d.ts
+++ b/js/lib.web_assembly.d.ts
@@ -161,3 +161,8 @@ declare namespace WebAssembly {
     constructor(message: string, fileName?: string, lineNumber?: string);
   }
 }
+
+// TODO Move ImportMeta intos its own lib.import_meta.d.ts file?
+interface ImportMeta {
+  url: string;
+}
diff --git a/js/location.ts b/js/location.ts
new file mode 100644
index 000000000..5e7cb07b4
--- /dev/null
+++ b/js/location.ts
@@ -0,0 +1,52 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+import { URL } from "./url";
+import { notImplemented } from "./util";
+import { Location } from "./dom_types";
+import { window } from "./globals";
+
+export function setLocation(url: string): void {
+  window.location = new LocationImpl(url);
+  Object.freeze(window.location);
+}
+
+export class LocationImpl implements Location {
+  constructor(url: string) {
+    const u = new URL(url);
+    this.url = u;
+    this.hash = u.hash;
+    this.host = u.host;
+    this.href = u.href;
+    this.hostname = u.hostname;
+    this.origin = u.protocol + "//" + u.host;
+    this.pathname = u.pathname;
+    this.protocol = u.protocol;
+    this.port = u.port;
+    this.search = u.search;
+  }
+
+  private url: URL;
+
+  toString(): string {
+    return this.url.toString();
+  }
+
+  readonly ancestorOrigins: string[] = [];
+  hash: string;
+  host: string;
+  hostname: string;
+  href: string;
+  readonly origin: string;
+  pathname: string;
+  port: string;
+  protocol: string;
+  search: string;
+  assign(url: string): void {
+    throw notImplemented();
+  }
+  reload(): void {
+    throw notImplemented();
+  }
+  replace(url: string): void {
+    throw notImplemented();
+  }
+}
diff --git a/js/location_test.ts b/js/location_test.ts
new file mode 100644
index 000000000..2302c32ed
--- /dev/null
+++ b/js/location_test.ts
@@ -0,0 +1,8 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+import { test, assert } from "./test_util.ts";
+
+test(function locationBasic() {
+  // location example: file:///Users/rld/src/deno/js/unit_tests.ts
+  console.log("location", window.location.toString());
+  assert(window.location.toString().endsWith("unit_tests.ts"));
+});
diff --git a/js/main.ts b/js/main.ts
index a5aae51a1..b67f188ac 100644
--- a/js/main.ts
+++ b/js/main.ts
@@ -4,12 +4,13 @@
 
 import "./globals";
 
-import { log } from "./util";
+import { assert, log } from "./util";
 import * as os from "./os";
 import { libdeno } from "./libdeno";
 import { args } from "./deno";
 import { replLoop } from "./repl";
 import { setVersions } from "./version";
+import { setLocation } from "./location";
 
 // builtin modules
 import * as deno from "./deno";
@@ -42,6 +43,12 @@ export default function denoMain() {
     os.exit(0);
   }
 
+  const mainModule = startResMsg.mainModule();
+  if (mainModule) {
+    assert(mainModule.length > 0);
+    setLocation(mainModule);
+  }
+
   const cwd = startResMsg.cwd();
   log("cwd", cwd);
 
@@ -51,8 +58,7 @@ export default function denoMain() {
   log("args", args);
   Object.freeze(args);
 
-  const inputFn = args[0];
-  if (!inputFn) {
+  if (!mainModule) {
     replLoop();
   }
 }
diff --git a/js/unit_tests.ts b/js/unit_tests.ts
index c8479145b..91c1745b6 100644
--- a/js/unit_tests.ts
+++ b/js/unit_tests.ts
@@ -22,6 +22,7 @@ import "./files_test.ts";
 import "./form_data_test.ts";
 import "./globals_test.ts";
 import "./headers_test.ts";
+import "./location_test.ts";
 import "./make_temp_dir_test.ts";
 import "./metrics_test.ts";
 import "./mixins/dom_iterable_test.ts";