js 本地保存 json/txt 文件

　　　　function download(filename, text) {
            var pom = document.createElement(‘a‘);
            pom.setAttribute(‘href‘, ‘data:text/plain;charset=utf-8,‘ + encodeURIComponent(text));
            pom.setAttribute(‘download‘, filename);
            if (document.createEvent) {
                var event = document.createEvent(‘MouseEvents‘);
                event.initEvent(‘click‘, true, true);
                pom.dispatchEvent(event);
            } else {
                pom.click();
            }
        }
        var data = {
            a:11,
            b:[{a:1,b:3}]
        }
        download("data.txt",JSON.stringify(data));