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Can we directly call Microsoft server API's by creating custom controls from UI ?

JS 1 Reputation point
2025-01-30T13:08:12.3133333+00:00

We have an JavaScript, HTML based application integrated with custom policies of Azure Active Directory B2C. Currently we are relying on Microsoft template and modifying the elements from Script side in UI. As per Current implementation we are triggering the Microsoft UI events from our UI side reading Id or Class of the DOM element lets say a button to execute the functionality and load next screen. Here our question is "Can we create a custom DOM elements at our UI end and consume the Microsoft server API's directly to execute the flow" ? Do we have feasibility and options to do this. Please suggest. Waiting for your prompt response. Thank you!

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  1. Martin Brandl 315 Reputation points MVP
    2025-01-30T13:14:12.2+00:00

    As of my understanding, You cannot fully replace the B2C-hosted UI with your own HTML form elements and call the internal “next-step” endpoints. B2C does not expose a “headless” sign-in API.

    You can extensively customize the appearance of the B2C pages via Page Layouts and custom CSS/JS. This is the officially supported route for advanced “Custom Policy” sign-up or sign-in flows

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