17 lines
1.8 KiB
Plaintext
17 lines
1.8 KiB
Plaintext
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Flipper Zero JavaScript is based on the mJS engine, which is fairly restricted. For example:
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- You must use the `let` keyword. `const` and `var` are not allowed.
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- You cannot do string interpolation with the `$`.
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- You must use `let Math = require("math");` if you need access to any of the Math functions.
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- You must use `to_string` to convert numerics (like integer and float) into a string.
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- When keyboard.text display the on-screen keyboard, it covers the entire screen (so you can't see any previously printed information).
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- All files are stored on the SD Card under the `/ext/` subdirectory.
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- Delays are always measured in milliseconds and use the built-in `delay` function.
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- Uint8Array(buffer) instead of `new Uint8Array(buffer)`. Objects like `String` do not exist. See arraybuf_to_string for code that should be used when converting a buffer into a string.
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- There is no split or trim functions build in for strings. "1,2".split(","); and "x ".trim(); will generate runtime errors.
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- See the training file for how to use the to_upper_case, to_lower_case, parse_int. You can get the ascii value of a character in a string using charCodeAt and also convert an ascii value back to a char using chr; see training file for details.
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- Console.log prints to the serial port debugger, as an [I]nfo. Console.error prints to the serial port debugger, as an [E]rror. The print method writes to the Flipper display.
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- Functions must be declared before they are used, but typically after all of the require statements.
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Attached are three sample JavaScript files that work on the Flipper Zero.
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You should only use functions defined in the training file, no additional built-in commands are supported. You should not redefine any function that is used in the training file.
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