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Device instance classification #13

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1745782
Device
denyncrawford Dec 11, 2020
fa033fc
documenting
denyncrawford Dec 11, 2020
2367ac4
Device handling
denyncrawford Dec 11, 2020
61e1f80
Updating index
denyncrawford Dec 11, 2020
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4 changes: 4 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -98,6 +98,10 @@ Creates a simple function to listen to barcode scanners
Refer [Key Values | MDN](https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key/Key_Values)

_default: `/^\w$/`_

- `devicePrefix` **string** Barcode prefix string for device event filtering

_default: `null`_

Returns **Scanner**

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13 changes: 13 additions & 0 deletions demo/index.html
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@@ -0,0 +1,13 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>

</body>
<script src="../dist/index.umd.js"></script>
<script src="index.js"></script>
</html>
7 changes: 7 additions & 0 deletions demo/index.js
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@@ -0,0 +1,7 @@
const scanner = simpleBarcodeScanner({
devicePrefix: 'QW'
});

scanner.on((data, e) => {
console.log(data)
})
13 changes: 11 additions & 2 deletions src/index.ts
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Expand Up @@ -27,6 +27,11 @@ export declare namespace BarcodeScanner {
* Refer {@link https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key/Key_Values Key Values | MDN}
*/
validKey?: RegExp;
/**
* Barcode prefix string for device event filtering
* @default null
*/
devicePrefix?: string | null;
}

interface HandlerFunction {
Expand Down Expand Up @@ -65,7 +70,8 @@ export default function BarcodeScanner(
minLength: 3,
element: document,
endKeys: ["Enter"],
validKey: /^\w$/
validKey: /^\w$/,
devicePrefix: null
},
options
);
Expand Down Expand Up @@ -93,8 +99,11 @@ export default function BarcodeScanner(
} else {
if (isEndKey) {
// End of barcode
if (code.length >= options.minLength) {
if (code.length >= options.minLength && !options.devicePrefix) {
fun(code, e);
} else if (code.length >= options.minLength && options.devicePrefix) {
// Check for device prefix
if (code.includes(options.devicePrefix)) fun(code.slice(options.devicePrefix.length), e)
}
}
// Invalid character, reset
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