Unable to successfully execute Element.requestFullscreen() across various browsers using TypeScript

I've been experimenting with the JavaScript Fullscreen API in my React-Typescript project. The goal is to display a div content in fullscreen mode when needed. Here's a snippet of my code:

var elem = document.getElementById("MyDiv");
if (elem.requestFullscreen) {
    elem.requestFullscreen();
}

While this works well in Chrome, I need to ensure compatibility across multiple browsers by using other functions like:

if (elem.mozRequestFullScreen) { /* Firefox */
    elem.mozRequestFullScreen();
} else if (elem.webkitRequestFullscreen) { /* Chrome, Safari and Opera */
    elem.webkitRequestFullscreen();
} else if (elem.msRequestFullscreen) { /* IE/Edge */
    elem.msRequestFullscreen();
}

However, when trying to implement these functions in TypeScript, I encounter a compile-time error stating "Property 'mozRequestFullScreen' does not exist on type 'HTMLElement'". Can anyone provide guidance on resolving this error and achieving fullscreen API support for all browsers?

typescripthtml5-fullscreen

Answer №1

Per Microsoft's latest update, starting from version v3.1, Typescript no longer includes vendor DOM API support in the standard lib.d.ts. It is now recommended to define these types within your own application code if you are certain that these APIs exist at runtime.

For instance, for Internet Explorer, you can create a custom type definition file named dom.ie.d.ts:

interface Element {
  msRequestFullscreen(): void;
  // ...
}

Answer №2

When faced with a similar situation, I decided to utilize the useRef hook to target the video element. In the previous scenario, you have the option to replace 'element' with

if (myElementRef.current.requestFullscreen) {
  myElementRef.current.requestFullscreen();
}

doing so will eliminate the Typescript warning. Pay attention to the use of 'current'

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