javascript两种创建txt文件并下载的方法

方法一（URL拼接方式）：

var a = document.createElement("a");
a.download = "content.txt";
a.href = "data:text/txt;charset=utf-8," + content;
a.textContent = "download";
a.click();

方法二（Blob转URL方式）：

var a = document.createElement("a");
a.download = "content.txt";
var blob = new Blob(["hello world"], {type: "text/txt"});
var content = URL.createObjectURL(blob);
a.href = content;
a.textContent = "download";
a.click();