<!DOCTYPE html >
<html>
<head>
<title>Untitled Page</title>
<script src = "https://ajax.googleapis.com/ajax/libs/angularjs/1.3.3/angular.min.js"></script>
</head>
<body>
<input type="file" name="file" id="file">
<script type="text/javascript">
document.getElementById('file').onchange = function(){
// create a new instance of FileReader
var reader = new FileReader();
var file = this.files[0];
var reader = new FileReader();
reader.onload = function(progressEvent){
// By lines
var lines = this.result.split('\n');
for(var line = 0; line < 3; line++){
document.write(lines[line]);
document.write("<br>");
}
};
reader.readAsText(file);
};
</script>
</body>
</html>
这是我用来读取文本文件的代码,使用给定的输入。如果没有作为输入,我想读取已经知道路径的文件。(例如:“index.html”)。我怎样才能更改此代码..