In this video tutorial, you will learn how to read text file in javascript line by line.
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Source Code:
HTML:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<div>
<input type="file">
<textarea cols="30" rows="20"></textarea>
</div>
<script src="script.js"></script>
</body>
</html>
CSS:
div {
display: flex;
flex-direction: column;
align-items: center;
}
textarea {
margin-top: 15px;
width: 50%;
}
Javascript:
let input = document.querySelector('input');
let textarea = document.querySelector('textarea');
input.addEventListener('change', () => {
let files = input.files;
if(files.length == 0) return;
const file = files[0];
let reader = new FileReader();
reader.onload = (e) => {
const file = e.target.result;
const lines = file.split(/\r\n|\n/);
textarea.value = lines.join('\n');
};
reader.onerror = (e) => alert(e.target.error.name);
reader.readAsText(file);
});
#javascript