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JavaScript
SmileUI.customerReady().then(customer => {
  if (customer) {
    // A customer is logged in
  } else {
    // No customer was identified (user needs
    // to log in or create an account)
  }
}).catch(err => {
  // An error has occurred will trying to
  // identify a customer
});

Documentation Index

Fetch the complete documentation index at: https://dev.smile.io/llms.txt

Use this file to discover all available pages before exploring further.

This method is deprecated and will be removed on August 1, 2026. Refer to the migration guide for instructions on choosing the appropriate replacement.
This method is used to detect when customer identification has completed and is useful for wrapping any code (or other Smile UI methods) that require a logged-in customer. It can also be used to decide when to render a logged-in vs. logged-out state.

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Returns

This method returns a Promise that resolves once customer identification has occurred (even if there is no logged-in customer) and does not wait for other dependencies. If customer identification has already occurred, the Promise will resolve immediately. The Promise will resolve with:
  • On success, a customer object when there is a currently logged-in customer, or null if no customer is currently logged-in.
  • On failure, an error object.