Shulou(Shulou.com)06/01 Report--

This article mainly introduces how JavaScript judges that the length of the array is not zero in if, which has a certain reference value, and interested friends can refer to it. I hope you can learn a lot after reading this article.

Determine the correct pose with a non-zero array length in if:

Scenario: if there are elements in the array, do the following:

/ badif (arr.length! = = 0) {/ / todo} / / goodif (arr.length) {/ / todo}

And so on, when we need to judge that the length of the array is empty:

If (! arr.length) {/ / todo} Thank you for reading this article carefully. I hope the article "how JavaScript determines that the array length is not zero in if" shared by the editor will be helpful to you. At the same time, I also hope you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.