js保存文件

js保存文件

function doSave(value, type, name) {
  var blob;
  if (typeof window.Blob == "function") {
    blob = new Blob([value], {
      type: type
    });
  } else {
    var BlobBuilder = window.BlobBuilder || window.MozBlobBuilder || window.WebKitBlobBuilder || window.MSBlobBuilder;
    var bb = new BlobBuilder();
    bb.append(value);
    blob = bb.getBlob(type);
  }
  var URL = window.URL || window.webkitURL;
  var bloburl = URL.createObjectURL(blob);
  var anchor = document.createElement("a");
  if ('download' in anchor) {
    anchor.style.visibility = "hidden";
    anchor.href = bloburl;
    anchor.download = name;
    document.body.appendChild(anchor);
    var evt = document.createEvent("MouseEvents");
    evt.initEvent("click", true, true);
    anchor.dispatchEvent(evt);
    document.body.removeChild(anchor);
  } else if (navigator.msSaveBlob) {
    navigator.msSaveBlob(blob, name);
  } else {
    location.href = bloburl;
  }
}

var test = {
  a: [1, 2],
  b: [3, 4]
}

doSave(JSON.stringify(test), "text/latex", "hello.txt");