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Prevent unnecessary teardown

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This commit is contained in:
David Walsh 2020-10-14 17:05:36 -05:00
parent 947bfb7a11
commit 15654b3d0b
1 changed files with 5 additions and 4 deletions
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7
ui/app/components/app/modals/qr-scanner/qr-scanner.component.js
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@ -119,10 +119,11 @@ export default class QrScanner extends Component {
// The `decodeFromInputVideoDevice` call prompts the browser to show // The `decodeFromInputVideoDevice` call prompts the browser to show
// the user the camera permission request. We must then call it again // the user the camera permission request. We must then call it again
// once we receive permission so that the video displays. // once we receive permission so that the video displays.
// Removing this teardown will create 2 video streams in Firefox, one // It's important to prevent this codeReader from being created twice;
// of which the user will not be able to remove without refreshing the page. // Firefox otherwise starts 2 video streams, one of which cannot be stopped
this.teardownCodeReader(); if(!this.codeReader) {
this.codeReader = new BrowserQRCodeReader() this.codeReader = new BrowserQRCodeReader()
}
try { try {
await this.codeReader.getVideoInputDevices() await this.codeReader.getVideoInputDevices()
this.checkPermissions(); this.checkPermissions();