摘要: 判断object 判断undefined 判断非undefined 转换成字符串 数组转换成对象 判断object function isObject(obj){ return obj !== null && typeof obj 'object' } 判断undefined function is 阅读全文
posted @ 2019-11-07 11:48 金钩梨 阅读(314) 评论(0) 推荐(0)