[ES6] Set caret to the end of text input

gistfile1.txt

const setCaretToTheEnd = el => {
    el.focus();
    
    if (typeof window.getSelection != "undefined"
            && typeof document.createRange != "undefined") {
        const range = document.createRange();
        range.selectNodeContents(el);
        range.collapse(false);
        const sel = window.getSelection();
        sel.removeAllRanges();
        sel.addRange(range);
    } else if (typeof document.body.createTextRange != "undefined") {
        const textRange = document.body.createTextRange();
        textRange.moveToElementText(el);
        textRange.collapse(false);
        textRange.select();
    }
}