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<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<input type="button" id="btncli" value="click" />
<script src="jquery-2.1.4.min.js"></script>
<script type="text/javascript">
var click=0;
$("#btncli").click(function(){
localStorage.setItem('msg', 'hello javascript');
var str = localStorage.getItem('msg');
var blob = new Blob([str]);
var a = document.createElement("a");
a.href = window.URL.createObjectURL(blob);
a.download = "a.txt";
a.textContent = "下载";
document.body.appendChild(a);
});
</script>
</body>
</html>
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