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I made a game with javascript using this tutorial as a base: http://html5gamedev.samlancashire.com/making-a-simple-html5-canvas-game-part-3-drawing-images/ How do I get it to write the data from the item counter (var itemCounter = 50;) to a text file named savedata.txt? I googled it, but no helpful results came up. Can someone help me?

user3055828
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4 Answers4

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Technically, you can create a server with nodejs [which is built with javascript]. Details can be found here

C. S.
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Its not possible to store the data as a file on the client. But you can use localstorage, websql, indexeddb or simply cookies for it. Note that all of these storages have different properties in terms of lifetime.

You could also create a blob using the blobapi and then create a dataurl and request the user to save it, using drag and drop + fileapi to read the data, this approach however will make it easy for users to modify the data.

LJᛃ
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Writing a file is posible with the new FileWriter and FileSystem APIs.

More mature solutions (not using files) have already been mentioned

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actual_kangaroo
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Javascript does not support working with files, for data storage several options are available:

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actual_kangaroo
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  • I already have a file called savedata.txt. I want it to write to it, not create it. – user3055828 Dec 02 '13 at 02:50
  • Updated the Answer, javascript is sandboxed preventing it from reading, writing or creating files. Although some newer APIs add this support ( see my other answer) – actual_kangaroo Dec 02 '13 at 03:12