function checkCss (vNode) {
                const regExp = new wRegExp('(?:;|^|\\s)(?:' + cssText + 'null)\\s*:[^;]*\\s*(?:;|$)', 'ig');
                let style = '';

                if (regExp && vNode.style.cssText.length > 0) {
                    style = regExp.test(vNode.style.cssText);
                }

                return !style;
            }
@description wraps text nodes of line selected text.
@param {Element} element The node of the line that contains the selected text node.
@param {Element} newInnerNode The dom that will wrap the selected text area
@param {Function} validation Check if the node should be stripped.
@param {Node} startCon The startContainer property of the selection object.
@param {Number} startOff The startOffset property of the selection object.
@param {Node} endCon The endContainer property of the selection object.
@param {Number} endOff The endOffset property of the selection object.
@param {Boolean} isRemoveFormat Is the remove all formats command?
@param {Boolean} isRemoveNode "newInnerNode" is remove node?
@param {Boolean} collapsed range.collapsed
@returns {{ancestor: *, startContainer: *, startOffset: *, endContainer: *, endOffset: *}}
@private