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Very simple autosave functionality using local storage
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| var AutoSave = (function(){ | |
| var timer = null; | |
| function getEditor(){ | |
| var elems = document.getElementsByTagName("textarea") | |
| if (elems.length <= 0) | |
| return null; | |
| return elems[0]; | |
| } | |
| function save(){ | |
| var editor = getEditor(); | |
| if (editor) { | |
| localStorage.setItem("AUTOSAVE_" + document.location, editor.value ) | |
| } | |
| } | |
| function restore(){ | |
| var saved = localStorage.getItem("AUTOSAVE_" + document.location) | |
| var editor = getEditor(); | |
| if (saved && editor){ | |
| editor.value = saved; | |
| } | |
| } | |
| return { | |
| start: function(){ | |
| var editor = getEditor(); | |
| if (editor.value.length <= 0) | |
| restore(); | |
| if (timer != null){ | |
| clearInterval(timer); | |
| timer = null; | |
| } | |
| timer = setInterval(save, 5000); | |
| }, | |
| stop: function(){ | |
| if (timer){ | |
| clearInterval(timer); | |
| timer = null; | |
| } | |
| } | |
| } | |
| }()) |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <html> | |
| <body> | |
| <textarea rows=24 cols=80></textarea> | |
| <script type="text/javascript" src="autosave.js"></script> | |
| <script type="text/javascript" src="http://code.jquery.com/jquery-1.8.1.min.js"></script> | |
| <script type="text/javascript"> | |
| $(document).ready(function(){ | |
| AutoSave.start(); | |
| }) | |
| $(window).unload(function(){ | |
| AutoSave.stop(); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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