SortKey in custom query: Javascript StoreFront API

[webprismdev]

Hey folks!

I have looked everywhere, and cannot find a solution to using sortKey in client.graphQLClient.send(). If someone can help me figure this one out, you'll be a lifesaver.

Where do I put the "sortKey" argument? Where on earth is the documentation for this, or am I just missing the mark big time?

My client needs to be able to sort Alphabetically, By Price, and Best Selling.

Thanks in advance!

Code:

Query

let productsQuery = client.graphQLClient.query((root) => {
  root.addConnection('products', {args: { first: 10}}, (product) => {
      product.add('title');
      product.add('descriptionHtml');
      product.add('totalInventory');
      product.add('tags');
    product.addConnection('variants', { args: { first: 10 } }, (variants) => {
      variants.add('product');
      variants.add('title');
      variants.add('price');
      });
    product.addConnection('images', {args: {first: 10}}, (images) => {
        images.add('src');
    })
  });
});

.send() function

    client.graphQLClient.send(productsQuery).then(({model, data}) => {
        this.setState({
            products: model.products
        });
    }).catch(err => console.log(err));