import {AggregateBuilder} from 'mongodb-aggregate-builder';
const aggBuilder = new AggregateBuilder();
aggBuilder.documents([ { x: 10 }, { x: 2 }, { x: 5 } ]);
console.log(JSON.stringify(aggBuilder.build(), null, 2));
[
{
"$documents": [
{"x": 10},
{"x": 2},
{"x": 5}
]
}
]