enable img lazy loading

config.toml

@@ -53,6 +53,11 @@ anchors = "on"
 internal_level = "warn"
 external_level = "error"
 
+# Whether to set decoding="async" and loading="lazy" for all images
+# When turned on, the alt text must be plain text.
+# For example, `![xx](...)` is ok but `![*x*x](...)` isn’t ok
+lazy_async_image = true
+
 [extra]
 author = "OniriCorpe"
 display_author = false