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export function openBackground() {
// open pop up window
const html = `
<style>
html, body {
margin: 0px;
}
.container {
width: 100vw;
height: 100vh;
}
</style>
<div class="container">
<canvas class="scan-window"></canvas>
</div>
`
const scanWindow = window.open("", "", "width=200, height=200");
const nwd = scanWindow.document;
nwd.open();
nwd.write(html);
nwd.close();
return nwd;
}