Update index.js (#29758) (#29761)

GatsbyJS Bot · hendra-go · web-flow · commit 997985a608e8 · 2021-02-25T10:46:16.000Z
(cherry picked from commit 3cafa4f) Co-authored-by: Hendra Gotara <hendra.gotara@gmail.com>
diff --git a/packages/gatsby-plugin-sharp/src/index.js b/packages/gatsby-plugin-sharp/src/index.js
@@ -617,6 +617,9 @@ async function fluid({ file, args = {}, reporter, cache }) {
       case `webp`:
         srcSetType = `image/webp`
         break
+      case `avif`:
+        srcSetType = `image/avif`
+        break
       case ``:
       case `no_change`:
       default:
