Can JavaScript Access and Manipulate Local Files Without External Applications?

Local File Access with JavaScript

Question: Can JavaScript manipulate local files without requiring an installed application like Adobe AIR? Specifically, can it read from one file and write to another?

Answer:

Yes, it is possible to handle local files with JavaScript thanks to HTML5 enhancements. Refer to the comprehensive article at http://www.html5rocks.com/en/tutorials/file/dndfiles/ for details.

HTML5 Interfaces for Local File Access:

• File: Represents a single file, providing readonly information like name, size, type, and a file handle reference.
• FileList: An array-like collection of File objects, useful for multiple file selection or directory dragging.
• Blob: Allows for dividing a file into byte ranges.

Additional Notes:

As mentioned in the answer, file permissions are assumed, and the provided interfaces support essential local file manipulation operations.

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