Promise is returning [object Promise]

Question

I am trying to do a basic check to see if an image is retina and has a portrait ratio. I have all that checking functionality working perfectly fine. My issue is that in the

Answer 1

The basic idea of a promise is that it gives you something to return right away even if it won't resolve until later. It represents its eventual value. So getImageMeta () is immediately returning the promise even though it has not resolved.

Once you have the promise returned by getImageMeta () you can use its then() to wait for the final boolean, which will come on the next event loop cycle at the earliest.

With your current code you are saving the promise returned by getImageMeta() to checkIfPortrait. So now checkIfPortrait holds this promise and you can call then() on it. Since you are exporting checkIfPortrait you will probably end up calling then on the module that imports it:

 // import checkIfPortrait
checkIfPortrait(src)
.then(ret_val => {
   //you can access boolean here in ret_val
})