Is it valid to use && instead of if?

Question

I am using && like this and it works

typeof foo === \'function\' && foo(); //if foo exist then call it

instead

Answer 1

You could use a void operator. This evaluates the expression and returns undefined.

void (foo && foo());

var foo;

void (foo && foo());

foo = () => console.log('foo');

void (foo && foo());