选择篇(107)-下面代码的输出是什么?

代码语言：javascript复制

const output = `${[] && 'Im'}possible!You should${'' && `n't`} see a therapist after so much JavaScript lol`

代码语言：javascript复制

A: possible! You should see a therapist after so much JavaScript lol
B: Impossible! You should see a therapist after so much JavaScript lol
C: possible! You shouldn't see a therapist after so much JavaScript lol
D: Impossible! You shouldn't see a therapist after so much JavaScript lol

答案: B

[]是一个真值。使用&&运算符，如果左侧值是真值，则返回右侧值。在这种情况下，左侧值[]是一个真值，所以返回Im。

""是一个假值。如果左侧值是假的，则不返回任何内容。 n't不会被退回。

im

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