JSFiddle - React, Tailwind, and code Playground

HTML

<div id="test" contenteditable="true" placeholder="">
   Focus and place the cursor to the end
</div>

JavaScript

$(document).ready(function(){
 focusAndPlaceCaretAtEnd($('#test'));
});
function focusAndPlaceCaretAtEnd(el) {
    el.focus();
    if (typeof window.getSelection != "undefined"
            && typeof document.createRange != "undefined") {
        var range = document.createRange();
        range.selectNodeContents(el);
        range.collapse(false);
        var sel = window.getSelection();
        sel.removeAllRanges();
        sel.addRange(range);
    } else if (typeof document.body.createTextRange != "undefined") {
        var textRange = document.body.createTextRange();
        textRange.moveToElementText(el);
        textRange.collapse(false);
        textRange.select();
    }
}