The ImageDecoder.isTypeSupported() static method checks if a given MIME type can be decoded by the user agent.

type

A string containing the MIME type to check for decoding support.

A promise that resolves with a boolean value indicating whether images with a format of type can be decoded by the API.

The following example checks if GIF and PCX images are supported for decoding and prints the result to the console.

let isGifSupported = await ImageDecoder.isTypeSupported("image/gif");
console.log(`GIF supported: ${isGifSupported}`); // Likely true.

let isPcxSupported = await ImageDecoder.isTypeSupported("image/pcx");
console.log(`PCX supported: ${isPcxSupported}`); // Probably false