vue解析富文本

 showHtml(str){
                        return str
                        .replace(str ? /&(?!#?\w+;)/g : /&/g, '&')
                        .replace(/</g,"<")
                        .replace(/>/g,">")
                        .replace(/"/g,"\"")
                        .replace(/'/g, "\'")
                        .replace(/&nbsp;/g,'\u3000')
                    },