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javascriptnullmicrosoft-edgeoptional-chaining
Eitanos30
Eitanos30

Reputation: 1429

syntax error while trying to use Optional Chaining (?.)

I have the following simple literal object:

const ob = { 'xxx:': 'abc', aaaa: 3, ccc: [1, 2, 3] };

let's say i'm not sure that i have a ccc key in the object so i want to use Optional Chaining but i'm getting a syntax error when trying to run:

const ddd = ob.ccc?.[0];

What is the correct syntax that takes the value only if *ccc key exist?

Upvotes: 0

Views: 1210

Answers (1)

Zhi Lv
Zhi Lv

Reputation: 21371

As Quentin said, the Optional chaining operator doesn't support the legacy version Microsoft Edge(Edge Html 12~18, the Microsoft Edge 44.18362.449.0 using Microsoft EdgeHTML 18.18363). More detail information, you could check the following links:

The optional chaining operator Browser compatibility

JavaScript operator: Optional chaining operator

To use the Optional chaining operator, you have to use the new Microsoft Edge, and upgrade the Microsoft Edge browser Version to 80+ version. You can download the latest version Microsoft Edge from here.

Reference: EdgeHtml

Upvotes: 1

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