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Jim Nielsen’s mom couldn’t open a website. Jim worked on confirming the issue and documented how he got to the bottom of it:

“[…] well it can’t be a browser issue. It’s not like my Mom is using Internet Explorer!

JavaScript has a (newish) feature called optional chaining. Say I have code like:

const name = Data.person.name;

If person happens to not exist on Data, I’m going to get a hard, show-stopping error. With optional chaining, I can …