e.keyCode === 13 && !e.shiftKey && e.preventDefault();
see an abbreviated js
on the network.but I can"t understand it all the time. I just know that it seems to be the abbreviation of if else
.if you change him back to the normal way of writing, what should he look like?
if (e.keyCode === 13 && !e.shiftKey) {
e.preventDefault();
} is not an abbreviation.
in fact, the writing on the first floor is more in line with the author's expectations.
aquarterb
return true
if all of a _ r _ b are true, but his calculation rule is
if an is true, it will determine whether b is true
if an is true, return false directly instead of judging whether b is true
this is a short circuit
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