algolia.js

// ObjectIDs = IDs of the 

index.search({
	query: documentId,
	attributesToRetrieve: ['objectID'],
	hitsPerPage: 100,
	distinct: false,
}, function searchDone(err, content) {
	if (err) {
		console.error(err);	
		return;
        }
	
	// We get the IDs to delete (the current ones corresponding to the document)
        const objectIDs = content.hits.map(hit => hit.objectID)

	index.deleteObjects(objectIDs, function(error, content) {
		if (!error) {
			index.waitTask(content.taskID, function(err) {
				if (err) {
					console.log(err);
				} else {
					console.log('content', content)
					// console.log('objects to add', objectsToAdd)
					index.addObjects(objectsToAdd, function(e, content) {
						// e ? true : console.log(content)
					});
				}
			});
		} else {
			console.log(error)
		}
	});
);