How to use javascript to access the standard api or other use api , I have extension like this at begin
export default extension( "purchase.checkout.contact.render-after", ( root, { ui, applyAttributeChange, applyShippingAddressChange, api } ) => {
And if I use this will fail
const discountCodes = api.useDiscountCodes();
Current I only can use the applyXXXXX function, Can't find way to use standard api or function that start with useXXX.
Can someone give me some direction to learn. Thank you.
