Add Navigator.onLine (#61)

https://html.spec.whatwg.org/multipage/system-state.html#dom-navigator-online-dev

Author: toastal

CHANGELOG.md

@@ -9,6 +9,7 @@ Breaking changes:
 New features:
 - Added `languages` value for `Navigator` (#59 by @toastal)
 - Added `HTMLHtmlElement` module and `documentElement` function `HTMLDocument` (#60 by @toastal)
+- Added `onLine` value for `Navigator` (#61 by @toastal)
 
 Bugfixes:
 

src/Web/HTML/Navigator.js

@@ -12,6 +12,12 @@ exports.languages = function (navigator) {
   };
 };
 
+exports.onLine = function (navigator) {
+  return function () {
+    return navigator.onLine;
+  };
+};
+
 exports.platform = function (navigator) {
   return function () {
     return navigator.platform;

src/Web/HTML/Navigator.purs

@@ -8,6 +8,8 @@ foreign import language :: Navigator -> Effect String
 
 foreign import languages :: Navigator -> Effect (Array String)
 
+foreign import onLine :: Navigator -> Effect Boolean
+
 foreign import platform :: Navigator -> Effect String
 
 foreign import userAgent :: Navigator -> Effect String