Is this javascript syntax is correct? Node,js throws a syntax error

Question

 if (oldPresenter?.userId !== currentPresenterId) {
      return setPresenterInPodReqMsg(setPresenterPayload);
    }

I got syntax error in this snippet running with Node.js but working for other people. I need explanation if it is correct JS syntax.

Put it in your question, please. And be specific. Errors usually point to a specific line or character. — isherwood
– isherwood, Commented Dec 23, 2020 at 20:30
Probably you aren't running a new enough version of nodejs to support the ?. feature. — jfriend00
– jfriend00, Commented Dec 23, 2020 at 20:30
You need node 14 or greater to use the safe navigation/chaining operator — Joe
– Joe, Commented Dec 24, 2020 at 2:38

FahDev · Accepted Answer · 2020-12-23 20:28:01Z

2

You are using optional chaining. It is in Stage 4. Optional chaining is supported in node version v14.2.0 or higher!

answered Dec 23, 2020 at 20:28

FahDev

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1 Comment

Artur Over a year ago

Here is the reference for the operator with browser compatibility, for those interested. I wasn't aware it's in development!

Machavity · Accepted Answer · 2020-12-23 21:52:53Z

1

?. is called the optional chaining operator. On the last versions of node it's valid syntax.

edited Dec 23, 2020 at 21:52

Machavity♦

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answered Dec 23, 2020 at 20:28

Michiel

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Comments

Karan · Accepted Answer · 2020-12-23 20:34:03Z

0

This javascript syntax will be reported incorrect for any Node version < 14. To be able to use this format ( specifically the ?. optional chaining syntax ), first check your node version using node -v on your commandline, and if < 14, then update to a Node version >=14.

answered Dec 23, 2020 at 20:34

Karan

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