js模拟点击下载文件到本地

    function fake_click(obj) {
      var ev = document.createEvent("MouseEvents");
      ev.initMouseEvent(
        "click", true, false, window, 0, 0, 0, 0, 0
        , false, false, false, false, 0, null
      );
      obj.dispatchEvent(ev);
    }

    function export_raw(name, data) {
      var urlObject = window.URL || window.webkitURL || window;

      var export_blob = new Blob([data]);

      var save_link = document.createElementNS("http://www.w3.org/1999/xhtml", "a")
      save_link.href = urlObject.createObjectURL(export_blob);
      save_link.download = name;
      fake_click(save_link);
    }

//name为文件名,例如“test.svg”或“test.xml”,带文件后缀,data为字符串

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