cutter/www/index.js

import {cut} from "democutter";


let fileSelect = document.getElementById('file');
let startInput = document.getElementById('start');
let endInput = document.getElementById('end');
fileSelect.addEventListener('change', (event) => {
    let start = parseInt(startInput.value);
    let end = parseInt(endInput.value);
    console.log(start, end);
    fileSelect.disabled = true;
    let reader = new FileReader();
    reader.readAsArrayBuffer(fileSelect.files[0]);
    reader.addEventListener('load', () => {
        console.log(reader.result);
        let result = cut(new Uint8Array(reader.result), start, end);
        fileSelect.disabled = false;
        save(result, "cut.dem");
    });
});

function save(data, fileName) {
    let a = document.createElement("a");
    document.body.appendChild(a);
    a.style = "display: none";
    let blob = new Blob([data], {type: "octet/stream"});
    let url = window.URL.createObjectURL(blob);
    a.href = url;
    a.download = fileName;
    a.click();
    window.URL.revokeObjectURL(url);
}