Added DateTimeFormat support for autosave.

Signed-off-by: Dmitry Mazurov <dimabzz@gmail.com>

README.md

@@ -122,7 +122,7 @@ easyMDE.value('New input for **EasyMDE**');
   - **delay**: Delay between saves, in milliseconds. Defaults to `10000` (10s).
   - **submit_delay**: Delay before assuming that submit of the form failed and saving the text, in milliseconds. Defaults to `autosave.delay` or `10000` (10s).
   - **uniqueId**: You must set a unique string identifier so that EasyMDE can autosave. Something that separates this from other instances of EasyMDE elsewhere on your website.
--  **timeFormat**: Time format 12/24. Defaults to 12.
+  - **timeFormat**: Set DateTimeFormat. More information see [DateTimeFormat instances](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/DateTimeFormat). Default `locale: en-US, format: hour:minute`.
   - **text**: Set text for autosave.
 - **blockStyles**: Customize how certain buttons that style blocks of text behave.
   - **bold**: Can be set to `**` or `__`. Defaults to `**`.
@@ -208,7 +208,16 @@ var editor = new EasyMDE({
 		uniqueId: "MyUniqueID",
 		delay: 1000,
 		submit_delay: 5000,
-		timeFormat: 24,
+		timeFormat: {
+			locale: 'en-US',
+			format: {
+				year: 'numeric',
+				month: 'long',
+				day: '2-digit',
+				hour: '2-digit',
+				minute: '2-digit',
+			},
+		},
 		text: "Autosaved: "
 	},
 	blockStyles: {

src/js/easymde.js

@@ -1479,6 +1479,14 @@ var promptTexts = {
     image: 'URL of the image:',
 };
 
+var timeFormat = {
+    locale: 'en-US',
+    format: {
+        hour: '2-digit',
+        minute: '2-digit',
+    },
+};
+
 var blockStyles = {
     'bold': '**',
     'code': '```',
@@ -1619,6 +1627,12 @@ function EasyMDE(options) {
     options.blockStyles = extend({}, blockStyles, options.blockStyles || {});
 
 
+    if (options.autosave != undefined) {
+        // Merging the Autosave timeFormat, with the given options
+        options.autosave.timeFormat = extend({}, timeFormat, options.autosave.timeFormat || {});
+    }
+
+
     // Merging the shortcuts, with the given options
     options.shortcuts = extend({}, shortcuts, options.shortcuts || {});
 
@@ -2000,31 +2014,10 @@ EasyMDE.prototype.autosave = function () {
         var el = document.getElementById('autosaved');
         if (el != null && el != undefined && el != '') {
             var d = new Date();
-            var hh = d.getHours();
+            var dd = new Intl.DateTimeFormat([this.options.autosave.timeFormat.locale, 'en-US'], this.options.autosave.timeFormat.format).format(d);
-            var m = d.getMinutes();
-            var dd = 'am';
-            var h = hh;
-            var html = '';
             var save = this.options.autosave.text == undefined ? 'Autosaved: ' : this.options.autosave.text;
             
-            m = m < 10 ? '0' + m : m;
+            el.innerHTML = save + dd;
-
-            if (this.options.autosave.timeFormat == undefined || this.options.autosave.timeFormat == 12) {
-                if (h >= 12) {
-                    h = hh - 12;
-                    dd = 'pm';
-                }
-                if (h == 0) {
-                    h = 12;
-                }
-
-                html = save + h + ':' + m + ' ' + dd;
-            }
-            if (this.options.autosave.timeFormat == 24) {
-                html = save + h + ':' + m;
-            }
-
-            el.innerHTML = html;
         }
 
         this.autosaveTimeoutId = setTimeout(function () {