JSFiddle - React, Tailwind, and code Playground

by termi

HTML

<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>JS Bin</title>
</head>
<body>
  <input type='text' id='hey' value='hello' />
    <p>click to page to set selection[Start/End]</p>
  <textarea>some text</textarea>
    <p>try to click to textarea</p>
</body>
</html>

JavaScript

var a = document.getElementById('hey');

function selectAll() {
  a.selectionStart = 0;
  a.selectionEnd = a.value.length;
}

document.addEventListener('click', selectAll);