[].forEach(key => { data[key]('foo') .then(() => console.log('bar')) .catch(() => console.log('baz')); }); [].forEach(key => { data('foo') [key]('bar') .then(() => console.log('bar')) .catch(() => console.log('baz')); }); window.Data[key]("foo") .then(() => a) .catch(() => b);
