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src/components/qr.ts

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+import { ref } from 'vue';
+
+interface QROptions {
+  width?: number;
+  margin?: number;
+  color?: {
+    dark: string;
+    light: string;
+  };
+}
+
+export const qrOptions = ref<QROptions>({
+  width: 100,
+  margin: 1,
+  color: {
+    dark: '#000000',
+    light: 'f0f0f0'
+  }
+});
+
+export const downloadData = (data: string) => {
+  const b = base64ToBytes(data)
+  downloadFile(b, 'teams_qr_code.pdf', 'application/pdf;teams_qr_code.pdf')
+}
+
+export const base64ToBytes = (base64: string): Uint8Array => {
+    const binaryString = atob(base64);
+    const bytes = new Uint8Array(binaryString.length);
+    for (let i = 0; i < binaryString.length; i++) {
+        bytes[i] = binaryString.charCodeAt(i);
+    }
+    return bytes;
+}
+
+export const downloadFile = (bytes: Uint8Array, fileName: string, mimeType: string) => {
+  const blob = new Blob([bytes], { type: mimeType });
+  const url = URL.createObjectURL(blob);
+  const link = document.createElement('a');
+  link.href = url;
+  link.download = fileName;
+  link.click();
+  URL.revokeObjectURL(url);
+};