refactor(frontend): getBgColorを共通化 (#14782)

* refactor: getBgColor関数の切り出し + fix types (taiyme#291)

* move thing

* revert unnecesary changes

---------

Co-authored-by: taiy <53635909+taiyme@users.noreply.github.com>

1 files changed, 14 insertions, 10 deletions

diff --git a/packages/frontend/src/components/MkContainer.vue b/packages/frontend/src/components/MkContainer.vue
index 8ab01d7db8..f513795c56 100644
--- a/packages/frontend/src/components/MkContainer.vue
+++ b/packages/frontend/src/components/MkContainer.vue
@@ -64,26 +64,30 @@ const showBody = ref(props.expanded);
 const ignoreOmit = ref(false);
 const omitted = ref(false);
 
-function enter(el) {
+function enter(el: Element) {
+	if (!(el instanceof HTMLElement)) return;
 	const elementHeight = el.getBoundingClientRect().height;
-	el.style.height = 0;
+	el.style.height = '0';
 	el.offsetHeight; // reflow
-	el.style.height = Math.min(elementHeight, props.maxHeight ?? Infinity) + 'px';
+	el.style.height = `${Math.min(elementHeight, props.maxHeight ?? Infinity)}px`;
 }
 
-function afterEnter(el) {
-	el.style.height = null;
+function afterEnter(el: Element) {
+	if (!(el instanceof HTMLElement)) return;
+	el.style.height = '';
 }
 
-function leave(el) {
+function leave(el: Element) {
+	if (!(el instanceof HTMLElement)) return;
 	const elementHeight = el.getBoundingClientRect().height;
-	el.style.height = elementHeight + 'px';
+	el.style.height = `${elementHeight}px`;
 	el.offsetHeight; // reflow
-	el.style.height = 0;
+	el.style.height = '0';
 }
 
-function afterLeave(el) {
-	el.style.height = null;
+function afterLeave(el: Element) {
+	if (!(el instanceof HTMLElement)) return;
+	el.style.height = '';
 }
 
 const calcOmit = () => {