タイムラインを放置すると先頭の投稿が見えなくなるのを修正 Fix #5903 (#5913)

* seqent fix

* comment

* ✌️

src/client/components/sequential-entrance.vue

@@ -40,22 +40,29 @@ export default Vue.extend({
 	i: 0,
 	methods: {
 		beforeEnter(el) {
+			if (document.hidden) return;
+
 			el.style.opacity = 0;
 			el.style.transform = this.direction === 'down' ? 'translateY(-64px)' : 'translateY(64px)';
-			let index = this.$options.i;
+			const delay = this.delay * this.$options.i;
-			const delay = this.delay * index;
 			el.style.transition = [getComputedStyle(el).transition, `transform 0.7s cubic-bezier(0.23, 1, 0.32, 1) ${delay}ms`, `opacity 0.7s cubic-bezier(0.23, 1, 0.32, 1) ${delay}ms`].filter(x => x != '').join(',');
 			this.$options.i++;
-		},
+
-		enter(el, done) {
 			setTimeout(() => {
+				el.style.transition = '';
+				this.$options.i--;
+			}, delay + 710);
+		},
+		enter(el) {
+			if (document.hidden) {
+				el.style.opacity = 1;
+				el.style.transform = 'translateY(0px)';
+				return;
+			};
+
+			setTimeout(() => { // 必要
 				el.style.opacity = 1;
 				el.style.transform = 'translateY(0px)';
-				el.addEventListener('transitionend', () => {
-					el.style.transition = '';
-					this.$options.i--;
-					done();
-				}, { once: true });
 			});
 		},
 		leave(el) {