How to get the customer's data on the frontend checkout page's client side (with JavaScript) using the «Magento_Customer/js/model/customer» object?

[dmitrii_fediuk]

Context: How to get the customer’s data on the frontend checkout page’s client side (with JavaScript)?

How is it implemented?

The «Magento_Customer/js/model/customer» JavaScript object interface

Usage examples

Despite of its wide interface, the only isLoggedIn() method is used:

How is the isLoggedIn() method of the «Magento_Customer/js/model/customer» object implemented and used?

[dmitrii_fediuk]

See also:

• How to get the customer’s data on the frontend checkout page’s client side (with JavaScript)?
• frontend-checkout-customer-data - tagged articles.
• The difference between window.customerData, Magento_Customer/js/customer-data, and Magento_Customer/js/model/customer on a frontend checkout page.