js判断对象是否为空

//判断是否为空，为空返回true
function strIsNullOrEmpty(str0) {
    var str = String(str0);
    var res = false;
    if (str == '' || str == null || str == 'null'
        || str == undefined || str == 'undefined')
        res = true;
    return res;
}

标签：undefined,对象,res,str0,js,str,var,为空
来源： https://www.cnblogs.com/v-dai/p/6944277.html