Select text with Vanilla and jQuery

jquery.selectText.js

// jQuery highlight text plugins
// It will select the text of first occurence
// of jQuery collection of element
jQuery.fn.selectText = function(){
    var doc = document
        , element = this[0]
        , range, selection
    ;
    if (doc.body.createTextRange) {
        range = document.body.createTextRange();
        range.moveToElementText(element);
        range.select();
    } else if (window.getSelection) {
        selection = window.getSelection();
        range = document.createRange();
        range.selectNodeContents(element);
        selection.removeAllRanges();
        selection.addRange(range);
    }

    return selection.toString() || range.toString();
};

selectText.js

// VanillaJS text highlight
// require a DOM element as parameter
function selectText(element) {
    var doc = document
        , text = element
        , range, selection
    ;
    if (doc.body.createTextRange) { //ms
        range = doc.body.createTextRange();
        range.moveToElementText(text);
        range.select();
    } else if (window.getSelection) { //all others
        selection = window.getSelection();
        range = doc.createRange();
        range.selectNodeContents(text);
        selection.removeAllRanges();
        selection.addRange(range);
    }
    return selection.toString() || range.toString();
}