ie兼容之js生成json文件并导出

此方法只兼容ie10以上以及firefox,chrome，ie9的解决方法还在研究中。。。哪位大神有办法，还请不吝赐教，小女子定当感激不尽。

html 代码

<span>
	<button onclick="downloadFile">导出json文件</button>
	<a target="_blank" id="downid" download></a>
</span>

js代码

function downloadFile() {
	var outportData = [{
		"key1": "test1",
		"key2": "test2"
	}, {
		"key1": "test1",
		"key2": "test2"
	}];

	if (typeof navigator !== "undefined" && navigator.msSaveOrOpenBlob) {
		//兼容ie10
		var blob = new Blob([JSON.stringify(outportData, null, 2)], {
			type: "data:application/json;charset=utf-8"
		});
		navigator.msSaveOrOpenBlob(blob, "test.json");
	} else {
		var downloadBtn = $("#downid")[0];
		var jsonData = "data:application/json;charset=utf-8" + json;
		downloadBtn.href = jsonData;
		downloadBtn.target = "_blank";
		downloadBtn.download = "test.json";
		downloadBtn.click();
	}
}