方法参考博客 http://blog.youkuaiyun.com/oscar999/article/details/16342699
解决数字类型首位为0被去掉首位的问题,参考博客http://blog.youkuaiyun.com/xiancaieeee/article/details/8057129
实战
var exportCsv = function(title,strArray){
strArray = strArray||invitationCode;
//title ["","",""]
//titleForKey ["","",""]
var str = [];
str.push(title+"\n");
for(var i=0;i<strArray.length;i++){
str.push('="'+strArray[i]+'"'+"\n");
}
var uri = 'data:text/csv;charset=utf-8,' + encodeURIComponent(str.join(""));
var downloadLink = document.createElement("a");
downloadLink.href = uri;
downloadLink.download = "invitationCode.csv";
document.body.appendChild(downloadLink);
downloadLink.click();
document.body.removeChild(downloadLink);
};