diff --git a/packages/client/src/ui/visitor/header.vue b/packages/client/src/ui/visitor/header.vue
index c39dc6577..b01c147c5 100644
--- a/packages/client/src/ui/visitor/header.vue
+++ b/packages/client/src/ui/visitor/header.vue
@@ -1,5 +1,5 @@
 <template>
-<div class="sqxihjet">
+<div ref="header" class="sqxihjet">
 	<div v-if="narrow === false" class="wide">
 		<div class="content">
 			<MkA to="/" class="link" active-class="active"><i class="fas fa-home icon"></i>{{ $ts.home }}</MkA>
@@ -13,7 +13,9 @@
 					<span v-if="info.title" class="text">{{ info.title }}</span>
 					<MkUserName v-else-if="info.userName" :user="info.userName" :nowrap="false" class="text"/>
 				</div>
-				<button v-if="info.action" class="_button action" @click.stop="info.action.handler"><!-- TODO --></button>
+				<button v-if="info.action" class="_button action" @click.stop="info.action.handler">
+					<!-- TODO -->
+				</button>
 			</div>
 			<div class="right">
 				<button class="_button search" @click="search()"><i class="fas fa-search icon"></i><span>{{ $ts.search }}</span></button>
@@ -22,8 +24,8 @@
 			</div>
 		</div>
 	</div>
-	<div v-else-if="narrow === true" class="narrow">
-		<button class="menu _button" @click="$parent.showMenu = true">
+	<div v-else-if="narrow" class="narrow">
+		<button class="menu _button" @click="showMenu = true">
 			<i class="fas fa-bars icon"></i>
 		</button>
 		<div v-if="info" class="title">
@@ -39,47 +41,38 @@
 </div>
 </template>
 
-<script lang="ts">
-import { defineComponent } from 'vue';
+<script lang="ts" setup>
+import { onMounted, ref, Ref } from 'vue';
 import XSigninDialog from '@/components/signin-dialog.vue';
 import XSignupDialog from '@/components/signup-dialog.vue';
 import * as os from '@/os';
 import { search } from '@/scripts/search';
 
-export default defineComponent({
-	props: {
-		info: {
-			required: true
-		},
-	},
+defineProps<{
+	info: any;
+}>();
 
-	data() {
-		return {
-			narrow: null,
-			showMenu: false,
-		};
-	},
+const narrow = ref(false);
+const showMenu = ref(false);
+const header: Ref<HTMLElement | null> = ref(null);
 
-	mounted() {
-		this.narrow = this.$el.clientWidth < 1300;
-	},
-
-	methods: {
-		signin() {
-			os.popup(XSigninDialog, {
-				autoSet: true
-			}, {}, 'closed');
-		},
-
-		signup() {
-			os.popup(XSignupDialog, {
-				autoSet: true
-			}, {}, 'closed');
-		},
-
-		search
+onMounted(() => {
+	if (header.value) {
+		narrow.value = header.value.clientWidth < 1300;
 	}
 });
+
+function signin(): void {
+	os.popup(XSigninDialog, {
+		autoSet: true,
+	}, {}, 'closed');
+}
+
+function signup(): void {
+	os.popup(XSignupDialog, {
+		autoSet: true,
+	}, {}, 'closed');
+}
 </script>
 
 <style lang="scss" scoped>
@@ -94,14 +87,14 @@ export default defineComponent({
 	backdrop-filter: var(--blur, blur(32px));
 	background-color: var(--X16);
 
-	> .wide {
-		> .content {
+	>.wide {
+		>.content {
 			max-width: 1400px;
 			margin: 0 auto;
 			display: flex;
 			align-items: center;
 
-			> .link {
+			>.link {
 				$line: 3px;
 				display: inline-block;
 				padding: 0 16px;
@@ -109,7 +102,7 @@ export default defineComponent({
 				border-top: solid $line transparent;
 				border-bottom: solid $line transparent;
 
-				> .icon {
+				>.icon {
 					margin-right: 0.5em;
 				}
 
@@ -118,8 +111,8 @@ export default defineComponent({
 				}
 			}
 
-			> .page {
-				> .title {
+			>.page {
+				>.title {
 					display: inline-block;
 					vertical-align: bottom;
 					white-space: nowrap;
@@ -127,11 +120,11 @@ export default defineComponent({
 					text-overflow: ellipsis;
 					position: relative;
 
-					> .icon + .text {
+					>.icon+.text {
 						margin-left: 8px;
 					}
 
-					> .avatar {
+					>.avatar {
 						$size: 32px;
 						display: inline-block;
 						width: $size;
@@ -151,76 +144,72 @@ export default defineComponent({
 						box-shadow: 0 -2px 0 0 var(--accent) inset;
 						color: var(--fgHighlighted);
 					}
-				}
 
-				> .action {
-					padding: 0 0 0 16px;
-				}
-			}
+					el>.right {
+						margin-left: auto;
 
-			> .right {
-				margin-left: auto;
+						>.search {
+							background: var(--bg);
+							border-radius: 999px;
+							width: 230px;
+							line-height: $height - 20px;
+							margin-right: 16px;
+							text-align: left;
 
-				> .search {
-					background: var(--bg);
-					border-radius: 999px;
-					width: 230px;
-					line-height: $height - 20px;
-					margin-right: 16px;
-					text-align: left;
+							>* {
+								opacity: 0.7;
+							}
 
-					> * {
-						opacity: 0.7;
-					}
+							>.icon {
+								padding: 0 16px;
+							}
+						}
 
-					> .icon {
-						padding: 0 16px;
+						>.signup {
+							border-radius: 999px;
+							padding: 0 24px;
+							line-height: $height - 20px;
+						}
+
+						>.login {
+							padding: 0 16px;
+						}
 					}
 				}
-
-				> .signup {
-					border-radius: 999px;
-					padding: 0 24px;
-					line-height: $height - 20px;
-				}
-
-				> .login {
-					padding: 0 16px;
-				}
-			}
-		}
-	}
-
-	> .narrow {
-		display: flex;
-
-		> .menu,
-		> .action {
-			width: $height;
-			height: $height;
-			font-size: 20px;
-		}
-
-		> .title {
-			flex: 1;
-			white-space: nowrap;
-			overflow: hidden;
-			text-overflow: ellipsis;
-			position: relative;
-			text-align: center;
-
-			> .icon + .text {
-				margin-left: 8px;
 			}
 
-			> .avatar {
-				$size: 32px;
-				display: inline-block;
-				width: $size;
-				height: $size;
-				vertical-align: middle;
-				margin-right: 8px;
-				pointer-events: none;
+			>.narrow {
+				display: flex;
+
+				>.menu,
+				>.action {
+					width: $height;
+					height: $height;
+					font-size: 20px;
+				}
+
+				>.title {
+					flex: 1;
+					white-space: nowrap;
+					overflow: hidden;
+					text-overflow: ellipsis;
+					position: relative;
+					text-align: center;
+
+					>.icon+.text {
+						margin-left: 8px;
+					}
+
+					>.avatar {
+						$size: 32px;
+						display: inline-block;
+						width: $size;
+						height: $size;
+						vertical-align: middle;
+						margin-right: 8px;
+						pointer-events: none;
+					}
+				}
 			}
 		}
 	}