下载文件

//html文件

<p>

　　<button id="downCsv"  onclick="downloadCSV()">下载csv</button>

</p>

 

//js文件

function downloadCSV() {

   var csv = '姓名,期中成绩,期末成绩\n张三,60,99\n李四,99,88';

// var a = document.createElement('a');

// a.href = 'data:text/txt;charset:UTF-8,\ufeff'+encodeURIComponent(csv);

// a.download = '测试成绩.csv';

// a.click();

   var blob = new Blob(['\ufeff' + csv],{type:'text/csv,charset=UTF-8'});

   download(blob,'测试.csv')

}

 

function download(url,saveName) {

　　if(typeof url == 'object' && url instanceof Blob){

　　　　url = URL.createObjectURL(url);

　　}

　　var aLink = document.createElement('a');

　　aLink.href = url;

　　aLink.download = saveName || '';

　　var event;

　　if(window.MouseEvent) {

　　　　event = new MouseEvent('click');

　　}else{

　　　　event = document.createEvent('MouseEvents');

　　　　event.initEvent('click',true,false,window,0,0,0,0,0,false,false,false,false,0,null);

　　}

　　aLink.dispatchEvent(event);

}