I'd use that for finding a deep value but not performing an action:
if (user?.foo?.bar) { user.login(); // or... logUserIn(user); // or whatever }
Also, the implication in your example is that isValid() returns a user object when that's not obvious - it looks like it should be a boolean.
isValid()
It has to be a boolean, boolean is how the data is first made.
The condition essentially evaluates to a boolean value, determining whether the nested property user.foo.bar exists and is truthy.
I am also engineer. Can we discuss more details?
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I'd use that for finding a deep value but not performing an action:
Also, the implication in your example is that
isValid()returns a user object when that's not obvious - it looks like it should be a boolean.It has to be a boolean, boolean is how the data is first made.
The condition essentially evaluates to a boolean value, determining whether the nested property user.foo.bar exists and is truthy.
I am also engineer. Can we discuss more details?