feat: add mapCache for rendered map

* apply new config option: "render", just pass function to replace "use"
* check configList when render. If ID and config content are the same,
  use cache otherwise
* remove CSS animation to prevent blinking when config changes very quick
* fix method about checking showcase is visible. This prevent reused map
  gain focus.

1 files changed, 0 insertions, 1 deletions

diff --git a/src/css/dumbymap.css b/src/css/dumbymap.css
index b9af75b..a2db479 100644
--- a/src/css/dumbymap.css
+++ b/src/css/dumbymap.css
@@ -120,7 +120,6 @@
       border: 3px solid transparent;
 
       background: white;
-      animation: map-fade-in 1s;
 
       &[data-focus="true"] {
         border: 3px solid gray;