How to download file in base64 format by ajax request to your api

download_ajax.js

$.ajax({
    url: "http://api.yoursite.com",
    data: data,
    type: "POST"
    }).done(function(result) {
        var link = document.createElement("a");
        document.body.appendChild(link);
        link.setAttribute("type", "hidden");
        link.href = "data:text/plain;base64," + result;
        link.download = "data.zip";
        link.click();
        document.body.removeChild(link);
    });