jsmodern/dist/iterator/is-async-iterator.js

An extension to existing JavaScript, influenced by other great languages such as Rust, Dart, Java, Golang, etc.

export const isAsyncIterator = {
    isStatic: true,
    label: 'isAsyncIterator',
    fn: function iteratorIsAsyncIterator(x) {
        return null == x ?
            false :
            'object' === typeof (x) && Boolean(x.next &&
                x.return &&
                x.throw &&
                x[Symbol.asyncIterator]);
    },
};
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