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I keep thinking that the optional chaining operator would also work for functions e.g. this.myOptionalfunction?('hello') were I would expect it would only get c

by wdb 6y ago

I keep thinking that the optional chaining operator would also work for functions e.g. this.myOptionalfunction?('hello') were I would expect it would only get called when it's defined. But that's not possible, I think they missed a nice addition. Oh looks like the operator is actually '?.' instead of just '?' so guess this.myOptionalFunction?.() could work but that looks really confusing in my eyes.

Legogris 6y ago
I am trying to think of a scenario where this makes sense, but I'm struggling. When do you want to call a function that might exist, and if so, not care about if it exists or not? (Since null or undefined returned from the function call can't be distinguished from the non-presence of the function)
- wolco 6y ago
  Getting data from third party parsing as json. If method exists log and add person/item to data object
- wdb 6y ago
  I was thinking to replace things like if(myFunction) { myFunction() }
jlokier 6y ago
It has to be '?.(...)' not '?(...)', because '?(...)' is already part of valid syntax. For example "this.myOptionalfunction?('hello'):('goodbye')".