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MimeTypeArray - Web APIs | MDN
MimeTypeArray.length
Deprecated
The number of items in the array.
MimeTypeArray.item()
Deprecated
Returns the MimeType
object with the specified index.
MimeTypeArray.namedItem()
Deprecated
Returns the MimeType
object with the specified name.
The following example tests whether a plugin is available for the 'application/pdf' mime type and if so, logs its description.
const mimeTypes = navigator.mimeTypes;
const pdf = mimeTypes.namedItem("application/pdf");
if (pdf) {
console.log(pdf.description);
}