25 lines
1.0 KiB
Markdown
25 lines
1.0 KiB
Markdown
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# JavaScript intro
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## Introduction
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I created an introduction to JavaScript video at [https://youtu.be/33Xmn5rnisc](https://youtu.be/33Xmn5rnisc).
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In the video I walked thru the [a_js_intro.js](./a_js_intro.js) file.
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The `a_js_intro.js` script ends up covering a lot of topics!
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- submenu : `setHeader`, `addItem`, `show`
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- keyboard : `text` (first param is # of bytes to allocate, including null terminator)
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- storage : `exists`
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- usbdisk : `start`, `wasEjected`, `stop`
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- textbox : `setConfig`, `emptyText`, `addText`, `show`, `isOpen`
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- gpio : `init`, `read`
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- badusb : `setup`, `isConnected`, `press`, `println`, `quit`
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- subghz : `transmitFile`
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- `let`, `=` (assignment), `for` (loop)
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- `require`, `print`, `delay`, `parse_int`, `__dirpath`
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- Strings, numbers, booleans
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- Arrays, `.length`
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- `+` (adding), `i++` (increment by 1), `!` (not)
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- `if`, `else if`, `===` (compare equal), `!==` (compare not equal)
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- calling functions, defining functions, `return`
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At the end of the video I ran [widget.js](./widget.js) to summarize what we learned.
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