note re if you're doing multiple widths

eleventy.config.js

@@ -92,7 +92,12 @@ export default async function(eleventyConfig) {
 				decoding: "async",
 			},
 		},
-		filenameFormat: function (id, src, width, format, options) {
+		filenameFormat: function (hash, src, width, format, options) {
+			// If you're building multiple widths
+			// const extension = path.extname(src);
+			// const name = path.basename(src, extension);
+
+			// return `${name}-${width}.${extension}`;
 			return path.basename(src);
 		},
 	});