JSFiddle - React, Tailwind, and code Playground

HTML

<textarea id="myTextarea">
342 Alvin Road Ducksburg 342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg342 Alvin Road Ducksburg</textarea>

JavaScript

function Select(input, startIndex, finalIndex) 
{            
            if ('selectionStart' in input) {
                input.selectionStart = startIndex;
                input.selectionEnd = finalIndex;                
                input.focus ();
            }
            else {  // Internet Explorer before version 9
                var inputRange = input.createTextRange();
                inputRange.moveStart ("character", startIndex);
                inputRange.collapse ();
                inputRange.moveEnd ("character", finalIndex);                            
                inputRange.select ();
            }
}

var textarea = document.getElementById("myTextarea");

Select(textarea, 140,textarea.innerHTML.length);