ispromise

Test whether an object is a promises/A+ object or constructor.

Usage no npm install needed!

<script type="module">
  import ispromise from 'https://cdn.skypack.dev/ispromise';
</script>

Test whether an object/function is a promises/A+ object/function or constructor. More powerful then is-promise.

npm i ispromise -S

var isPromise = require('ispromise');

isPromise(Promise) // false
isPromise(Promise.resolve()) // true
isPromise.isConstructor(Promise) // true

MIT@Jingchen Zhao