html标签快速转换思想方法

function htmlencode(s){
    var div = document.createElement('div');
    div.appendChild(document.createTextNode(s));
    return div.innerHTML;
}
function htmldecode(s){
    var div = document.createElement('div');
    div.innerHTML = s;
    return div.innerText || div.textContent;
}
通过容器来操作，替代正则