<html>
<head>
<script>
var openFile = function(event) {
var input = event.target;
var reader = new FileReader();
reader.onload = function(){
var text = reader.result;
var node = document.getElementById('output');
node.innerText = text;
console.log(reader.result.substring(0, 200));
};
reader.readAsText(input.files[0]);
};
</script>
</head>
<body>
<input type='file' accept='text/plain' onchange='openFile(event)'><br>
<div id='output'>
...
</div>
</body>
</html>參考網址:http://stackoverflow.com/questions/14446447/javascript-read-local-text-file
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