How does JavaScript prevent code from crashing

Editor to share with you how JavaScript to prevent code crashes, 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 know it!

Prevent code from crashing

It's not good to have unpredictable behavior in your code, but if you do, you need to deal with it.

For example, a common error TypeError, trying to get attributes such as undefined/null, will report this error.

Const found = [{name: "Alex"}] .find (I = > i.name = = 'Jim') console.log (found.name) / / TypeError: Cannot read property' name' of undefined

We can avoid it like this:

Const found = [{name: "Alex"}] .find (I = > i.name = 'Jim') | {} console.log (found.name) / / undefined is all the contents of the article "how to prevent code from crashing 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!