We know that Ionic apps are built using web technologies such as HTML, CSS, and JavaScript. These web technologies are rendered using Web Views, which are full screen and full-powered web browsers.

The latest web view provides many built-in HTML5 APIs for hardware functionality, which are a camera, Bluetooth, GPS, sensors, and speakers. Sometimes it also needs to access platform-specific APIs. In the Ionic framework, the hardware APIs can be accessed through a bridge layer, typically by using native plugins that expose JavaScript APIs.

The following image provides you a detailed explanation of web view architecture.