In addition to the usual
:devtools hooks into the live-reload process via :before-load and :after-load it is now possible to configure this via metadata in code. Making the shadow-cljs.edn config for this optional.
The old way
{...
:builds
{:app {...
:devtools {:after-load my.app/on-jsload}}}
Can now be done via
(ns my.app)
(defn ^:dev/before-load my-before-hook []
(js/console.log "I was called before any code was loaded"))
(defn ^:dev/after-load-async my-before-async-hook [done]
(js/console.log "I was called before any code was loaded")
(js/setTimeout done 250)
(defn ^:dev/after-load my-after-hook []
(js/console.log "I was called after all code was loaded"))
(defn ^:dev/after-load-async my-after-async-hook [done]
(js/console.log "I was called after all code was loaded")
(js/setTimeout done 250)
Multiple hooks are allowed and will execute in load order meaning sources that are loaded first will execute their after-load hooks first and before-load last. The async variants will receive one callback fn which they must call when their work is done.