Gene Zhang's Blog https://blog.dailybetter.cn/blog Never be afraid. Just start by doing it for 5 minutes. en-us zhangjqfriend@gmail.com (Gene Zhang) zhangjqfriend@gmail.com (Gene Zhang) Wed, 01 Jan 2025 10:50:00 GMT https://blog.dailybetter.cn/blog/js/undefined-vs-null undefined vs null in JavaScript https://blog.dailybetter.cn/blog/js/undefined-vs-null undefined Wed, 01 Jan 2025 10:50:00 GMT zhangjqfriend@gmail.com (Gene Zhang) js