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JavaScript

const withNativeArrayBuffer = typeof ArrayBuffer === "function";
const isView = (obj) => {
return typeof ArrayBuffer.isView === "function"
? ArrayBuffer.isView(obj)
: obj.buffer instanceof ArrayBuffer;
};
const toString = Object.prototype.toString;
const withNativeBlob = typeof Blob === "function" ||
(typeof Blob !== "undefined" &&
toString.call(Blob) === "[object BlobConstructor]");
const withNativeFile = typeof File === "function" ||
(typeof File !== "undefined" &&
toString.call(File) === "[object FileConstructor]");
/**
* Returns true if obj is a Buffer, an ArrayBuffer, a Blob or a File.
*
* @private
*/
export function isBinary(obj) {
return ((withNativeArrayBuffer && (obj instanceof ArrayBuffer || isView(obj))) ||
(withNativeBlob && obj instanceof Blob) ||
(withNativeFile && obj instanceof File));
}
export function hasBinary(obj, toJSON) {
if (!obj || typeof obj !== "object") {
return false;
}
if (Array.isArray(obj)) {
for (let i = 0, l = obj.length; i < l; i++) {
if (hasBinary(obj[i])) {
return true;
}
}
return false;
}
if (isBinary(obj)) {
return true;
}
if (obj.toJSON &&
typeof obj.toJSON === "function" &&
arguments.length === 1) {
return hasBinary(obj.toJSON(), true);
}
for (const key in obj) {
if (Object.prototype.hasOwnProperty.call(obj, key) && hasBinary(obj[key])) {
return true;
}
}
return false;
}