Textarea select() Method
Textarea Object
Definition and Usage
The select() method selects the entire contents of a text area.
Syntax
Browser Support

The select() method is supported in all major browsers.
Example
Example
Select the contents of the text area:
<html>
<head>
<script>
function displayResult()
{
document.getElementById("myTextarea").select();
}
</script>
</head>
<body>
<textarea id="myTextarea" cols="20">
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</textarea>
<br>
<button type="button" onclick="displayResult()">Select
contents of text area</button>
</body>
</html>
Textarea Object
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