Hi, In Firefox 74, we'll ship the optional chaining operator.
*Bug: *https://bugzilla.mozilla.org/show_bug.cgi?id=1566143 *Standard: *https://tc39.es/proposal-optional-chaining/ *Platform coverage: *All, no pref *DevTools bug: *N/A. *Other browsers:* Shipping in Chrome, Shipping in Safari *Testing: * https://github.com/tc39/test262/tree/master/test/language/expressions/optional-chaining <https://github.com/tc39/test262/tree/master/test/language/expressions/coalesce> *Use cases: *Optional chaining may be useful in cases where a property may be conditionally present. This affects property access, dynamic property access, and function calls in the following way: *Property access* Before const street = user.address && user.address.street; After const street = user.address?.street; *Dynamic Property Access* Before const street = user.address && user.address["street"]; After const street = user.address?.["street"]; *Optional function calls:* Before const result = myObj.method && myObj.method(); After const result = myObj?.method(); *Secure contexts:* This is a JS language feature and is therefore present in all contexts. _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
