the isWeekend flag holds a boolean value (which is condition not the key), and based on that we decide which key property (music or routine) to add to the mood object, and since the Spread operator (three dots ...) allows us to add/concat things into object and array literals that was the point of using it! is to add the desirable key conditionally.
If you try to execute your second snippet
constmood={isWeekend?...{}:...{}}
You'll get syntax error.
I create a demo for the same logic in ES6 and its equivalent in ES5.
I hope that answers your question.
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Hi, I'm not sure about this... Please explain how this works.
How does one spread a Boolean?
Should this not be
the
isWeekendflag holds a boolean value (which is condition not the key), and based on that we decide which key property (musicorroutine) to add to themoodobject, and since the Spread operator (three dots...) allows us to add/concat things into object and array literals that was the point of using it! is to add the desirable key conditionally.If you try to execute your second snippet
You'll get syntax error.
I create a demo for the same logic in ES6 and its equivalent in ES5.
I hope that answers your question.