Function downloadData

docs/app/js/sanddance-app.js:52015–52030

(data, fileName)

// Licensed under the MIT license.
parcelHelpers.export(exports, "downloadData", ()=>downloadData);
function downloadData(data, fileName) {
    // Adapted from https://ourcodeworld.com/articles/read/189/how-to-create-a-file-and-generate-a-download-with-javascript-in-the-browser-without-a-server
    var a = document.createElement("a");
    a.setAttribute("download", fileName);
    document.body.appendChild(a);
    const blob = dataURIToBlob(data);
    a.href = URL.createObjectURL(blob);
    // we must revoke the object URL, 
    // since we can't know when the download occured, we have to attach it on the click handler..
    a.onclick = ()=>{
        // ..and to wait a frame
        requestAnimationFrame(()=>URL.revokeObjectURL(a.href));
        document.body.removeChild(a);
    };
    a.click();
}
//from https://stackoverflow.com/a/37151835/620501
function dataURIToBlob(binStr) {
    var len = binStr.length, arr = new Uint8Array(len);