How to realize the short-circuit condition in JavaScript

Editor to share with you how JavaScript to achieve short-circuit conditions, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to understand it!

Short circuit condition

If you've ever seen code like this:

If (conected) {login ();}

Then you can use the & & (AND operator) between these two variables to shorten the code. For example, the previous code can be reduced to one line:

Conected & & login ()

You can also use this method to check whether there are certain properties or functions in the object. Similar to the following code:

User & & user.login (); above is all the content of the article "how to achieve short-circuit condition in JavaScript". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!