Loading, Editing, and Saving a Text File in HTML5 Using Javascript

This Could Be Better

The HTML and JavaScript code below makes use of some features of HTML5 (specifically the “Blob” object, the File API, and the “download” attribute of the “a” tag) to allow the user to load, edit, and save a text file on their local computer.  As of this writing, it works in both Chrome and Firefox browsers, though sadly it requires a little bit of custom code for each.

To see it in action, copy it into an .html file and open that file in a web browser that runs JavaScript.  Or, for an online version, visit http://thiscouldbebetter.neocities.org/texteditor.html.

<html> <body> <table> <tr><td>Text to Save:</td></tr> <tr> <td colspan="3"> <textarea id="inputTextToSave" style="width:512px;height:256px"></textarea> </td> </tr> <tr> <td>Filename to Save As:</td> <td><input id="inputFileNameToSaveAs"></input></td> <td><button onclick="saveTextAsFile()">Save Text to File</button></td> </tr> <tr> <td>Select a File to Load:</td> <td><input type="file" id="fileToLoad"></td> <td><button onclick="loadFileAsText()">Load Selected File</button><td> </tr> </table> <script type='text/javascript'> function saveTextAsFile() { var textToWrite = document.getElementById("inputTextToSave").value; var textFileAsBlob…

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