<script>
    let scanner = new Instascan.Scanner({ video: document.getElementById('preview')});
    Instascan.Camera.getCameras().then(function(cameras){
    if(cameras.length > 0 ){
            scanner.start(cameras[0]);
        }else{
            alert('No cameras found');
        }
    }).catch(function(e) {
        console.error(e);
    });
    scanner.addListener('scan',function(c){
        document.getElementById('text').value=c;
    });
</script>    
    <!--/Modal-->
<script>
    let scanner_ = new Instascan.Scanner({ video: document.getElementById('preview2')});
    Instascan.Camera.getCameras().then(function(cameras){
    if(cameras.length > 0 ){
            scanner_.start(cameras[0]);
        }else{
            alert('No cameras found');
        }
    }).catch(function(e) {
        console.error(e);
    });
    scanner_.addListener('scan',function(c){
        document.getElementById('text1').value=c;
    });
</script>