operators - What does (myVar && foo()) mean in JavaScript? -

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(myvar && foo())

what above code mean? equivalent to?

i think runs on single line.

the expression evaluates myvar if myvar falsey, , foo() if myvar truthy. following snippets identical.

var x = (myvar && foo());  if(myvar){ var x = foo(); } else { var x = myvar; }

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