JavaScript File Download

client-file-download.js

function createDownloadLink(str, fileName, contentType) {
    var blob = new Blob([str], {
        type: "application/json;charset=utf-8"
    });
    var blobUrl = URL.createObjectURL(blob);
    var a = document.createElement("a");
    a.href = blobUrl;
    a.setAttribute("download", fileName + ".json");
    document.body.appendChild(a);
    a.click();
}