https://www.syncfusion.com/blazor-components/blazor-input-mask
Blazor Input Mask | Masked Textbox Component | Syncfusion
The Blazor input mask component provides an easy way to mask an textbox to get date, phone number and other formatted values.
input maskblazormaskedtextboxcomponent
https://imask.js.org/
Javascript Input Mask | imaskjs
vanilla javascript input mask
input maskjavascript