What's the difference from simply writing a.b instead of a?.b? It still returns undefined if a is undefined, as far as I see.
a.b
a?.b
undefined
a
Actually if you try to access a property of undefined you will get an error Uncaught TypeError: Cannot read property 'b' of undefined
Uncaught TypeError: Cannot read property 'b' of undefined
Interesting. I'm quite sure it didn't work that way the last time I tried JS, some 10 years ago. :-D
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What's the difference from simply writing
a.binstead ofa?.b? It still returnsundefinedifaisundefined, as far as I see.Actually if you try to access a property of
undefinedyou will get an errorUncaught TypeError: Cannot read property 'b' of undefinedInteresting. I'm quite sure it didn't work that way the last time I tried JS, some 10 years ago. :-D