Saw this in a PR at work:

let result = '';

if (bar && foo) {
  result = 'bingo bango bongo';
} else if (!bar && foo) {
  result = 'bish bash bosh';
} else if (bar) {
  result = 'ez peazy lemon squeezy';
}

return result


Or something similar, made me think of how you could write this cleaner. 
if (fooCondition) {
  return barCondition ? 'bingo bango bongo' : 'bish bash bosh';
} else {
  return barCondition ? 'ez peazy lemon squeezy' : '';
}


Seeing as we are not doing anything else aside from returning, we can use all turneries.

return fooCondition
  ? barCondition
    ? 'bingo bango bongo'
    : 'bish bash bosh'
  : barCondition
    ? 'ez peazy lemon squeezy'
    : '';


Often we can place these into an object if we want to get results based on a few parameters. 
return ({
  true: {
    true: 'bingo bango bongo',
    false: 'bish bash bosh',
  },
  false: {
    true: 'ez peazy lemon squeezy',
    false: '',
  },
})[fooCondition][barCondition];


We can code golf this up a bit. 
return ({
  1: {
    1: 'bingo bango bongo',
    0: 'bish bash bosh',
  },
  0: {
    1: 'ez peazy lemon squeezy',
    0: '',
  },
})[+fooCondition][+barCondition];


An object with numbers for keys is just an array. 
return [['bingo bango bongo', 'bish bash bosh'], ['ez peazy lemon squeezy', '']][
    +fooCondition
][+barCondition];


Much better.