Extract `saveURLAsFile`

ts/util/saveURLAsFile.ts

@@ -0,0 +1,17 @@
+/**
+ * @prettier
+ */
+export const saveURLAsFile = ({
+  filename,
+  url,
+  document,
+}: {
+  filename: string;
+  url: string;
+  document: Document;
+}): void => {
+  const anchorElement = document.createElement('a');
+  anchorElement.href = url;
+  anchorElement.download = filename;
+  anchorElement.click();
+};