mouseup.htm

overlay.addEventListener('mouseup', e => {
                    if (isDrawing) {
                        isDrawing = false;
                         
                        mousePosition.innerHTML = "Cursor: (" + e.offsetX + ", " + e.offsetY + ")";
                        region.innerHTML = "Decode a region: (" + startX + ", " + startY + ", " + e.offsetX + ", " + e.offsetY + "). ";
                        overlay.style.cursor = "default";
 
                        // Decode a region of the barcode image
                        (async () => {
                            let settings = await barcodereader.getRuntimeSettings();
                            settings.region.regionLeft = startX * 100 / overlay.width;
                            settings.region.regionTop = startY * 100 / overlay.height;
                            settings.region.regionRight = e.offsetX * 100 / overlay.width;
                            settings.region.regionBottom = e.offsetY * 100 / overlay.height;
                            settings.region.regionMeasuredByPercentage = 1;
                            barcodereader.updateRuntimeSettings(settings);
                            try {
                                let decodingStart = Date.now();
                                await barcodereader.decode(name.files[0]).then((results) => {
                                    let decodingEnd = Date.now();
                                    let txts = [];
                                    try {
                                        for (let i = 0; i < results.length; ++i) {
                                            txts.push(results[i].BarcodeText);
                                        }
                                        let barcoderesults = txts.join(', ');
                                    catch (e) {
                                    }
                                });
                            } catch (error) {
                                alert(error);
                            }
                        })();
                    }
 
                });