使用JSZip-sync这个包代替jszip即可。
npm地址：https://www.npmjs.com/package/jszip-sync
用法

var JSZip = require("jszip-sync");
var zip = new JSZip();
//相较于jszip  此方法只是在外层包裹了zip.sync，其他用法都和jszip用法一致
var zipped = zip.sync(function() {
    // put some stuff in there
    zip.file("Hello.txt", "Hello World\n");
    var img = zip.folder("images");
    img.file("smile.gif", imgData, {base64: true});
    // call regular async methods
    var data = null;
    zip.generateAsync({type: "arraybuffer", compression: "DEFLATE"})
        .then(function(content) {
            data = content;
            });
    return data;        
});