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# js_gui__byte_input {#js_gui__byte_input}
# Byte input GUI view
Displays a keyboard.
<img src="byte_input.png" width="200" alt="Sample screenshot of the view" />
```js
let eventLoop = require("event_loop");
let gui = require("gui");
let byteInputView = require("gui/byte_input");
```
This module depends on the `gui` module, which in turn depends on the
`event_loop` module, so they _must_ be imported in this order. It is also
recommended to conceptualize these modules first before using this one.
# Example
For an example refer to the `gui.js` example script.
# View props
## `length`
Data buffer length
Type: `number`
## `header`
Single line of text that appears above the keyboard
Type: `string`
## `defaultData`
Data to show in byte input by default
Type: `Uint8Array | ArrayBuffer`
# View events
## `input`
Fires when the user selects the "save" button.
Item type: `ArrayBuffer`