fix: Add guard to date format to prevent invalid months

elliott-with-the-longest-name-on-github · elliott-with-the-longest-name-on-github · commit f9fa8f8cb0ff · 2025-08-18T14:36:33.000-06:00
diff --git a/apps/svelte.dev/src/lib/server/content.ts b/apps/svelte.dev/src/lib/server/content.ts
@@ -24,6 +24,10 @@ const months = 'Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec'.split(' ');
 
 function format_date(date: string) {
 	const [y, m, d] = date.split('-');
+	const month = months[+m - 1];
+	if (month === undefined) {
+		throw new Error(`Invalid blog post month for date ${date}`);
+	}
 	return `${months[+m - 1]} ${+d} ${y}`;
 }
 

Original file line number	Diff line number	Diff line change
`@@ -24,6 +24,10 @@ const months = 'Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec'.split(' ');`
`24`	`24`
`25`	`25`	`function format_date(date: string) {`
`26`	`26`	`const [y, m, d] = date.split('-');`
	`27`	`+ const month = months[+m - 1];`
	`28`	`+ if (month === undefined) {`
	`29`	+ throw new Error(`Invalid blog post month for date ${date}`);
	`30`	`+ }`
`27`	`31`	return `${months[+m - 1]} ${+d} ${y}`;
`28`	`32`	`}`
`29`	`33`