Shopify Checkout With availableShippingRates

checkoutWithShippingRates.js

const query = await client.graphQLClient.query(root => {
    root.add('node', {
        args: {
            id: checkoutId
        },
        alias: 'checkout'
    }, node => {
        node.add('id')
        node.addInlineFragmentOn('Checkout', Checkout => {
            Checkout.add('subtotalPrice')
            Checkout.add('totalTax')
            Checkout.add('totalPrice')
            Checkout.add('availableShippingRates', rates => {
                rates.add('ready')
                rates.add('shippingRates', shippingRates => {
                    shippingRates.add('handle')
                    shippingRates.add('title')
                    shippingRates.add('priceV2', price => {
                        price.add('amount')
                        price.add('currencyCode')
                    })
                })
            })
            Checkout.addConnection(
                'lineItems', {
                    args: {
                        first: 250
                    }
                },
                lineItems => {
                    lineItems.add('variant', variant => {
                        variant.add('title')
                        variant.add('image', image => image.add('src'))
                        variant.add('price')
                    })
                    lineItems.add('quantity')
                },
            )
        })
    })
})

client.graphQLClient.send(query, {
    checkoutId: checkoutId,
})