摘要: let str1 = '' let arr1 = [] let obj1 = {} let sth1 = null let data = undefined console.log('str1:',str1) console.log('arr:',arr1) console.log('obj1:', 阅读全文
posted @ 2022-04-08 07:24 zhangzhebokeyuan 阅读(66) 评论(0) 推荐(0) 编辑