z自定义指令

src/App.vue

@@ -1,14 +1,14 @@
 <template>
-	<Header />
+	<MainHeader />
 	<RouterView />
-	<Footer />
+	<MainFooter />
 	<BackTop />
 </template>
 
 <script setup lang="ts">
-import { RouterView } from 'vue-router'
-import Header from './components/header.vue'
-import Footer from './components/footer.vue'
+	import { RouterView } from "vue-router";
+	import MainHeader from "./components/main-header.vue";
+	import MainFooter from "./components/main-footer.vue";
 	import BackTop from "./components/back-top.vue";
 </script>
 <style scoped lang="less">

src/components/back-top.vue

@@ -1,9 +1,5 @@
 <template>
-	<div
-		class="back-top"
-		@click="handleClick"
-		:class="[progress > 0 ? 'active' : 'hidden']"
-	>
+	<div class="back-top" @click="handleClick" v-scroll-progress="handleScroll">
 		<svg width="100%" height="100%" viewBox="-1 -1 102 102">
 			<path
 				d="M50,1 a49,49 0 0,1 0,98 a49,49 0 0,1 0,-98"
@@ -20,26 +16,17 @@
 </template>
 
 <script setup lang="ts">
-	import { ref, onMounted, onUnmounted, h } from "vue";
+	import { ref, onMounted, onUnmounted } from "vue";
 	const max = ref(98 * Math.PI);
 	const progress = ref(0);
-	const handleScroll = () => {
-		const el = document.documentElement;
-		const num = el.scrollTop / (el.scrollHeight - el.clientHeight);
-		progress.value = max.value * num;
+	const handleScroll = (e: number) => {
+		progress.value = (e / 100) * max.value;
 	};
 	const handleClick = () => {
 		document.documentElement.scrollTo({ top: 0, behavior: "smooth" });
 	};
-	onMounted(() => {
-		handleScroll();
-		document.addEventListener("scroll", handleScroll);
-	});
-	onUnmounted(() => {
-		document.removeEventListener("scroll", handleScroll);
-	});
 </script>
-<style scoped>
+<style scoped lang="less">
 	.back-top {
 		position: fixed;
 		right: 30px;
@@ -53,40 +40,43 @@
 		-webkit-box-shadow: inset 0 0 0 1px #e1e1e1;
 		box-shadow: inset 0 0 0 1px #e1e1e1;
 		z-index: 999;
-	}
-	.back-top svg {
+		display: flex;
+		align-items: center;
+		justify-content: center;
+		> svg {
+			position: absolute;
 			width: 100%;
 			height: 100%;
-	}
-	.back-top path {
+			> path {
 				transition: stroke-dashoffset 10ms linear;
 			}
-	.back-top.active {
-		animation: active 0.2s linear both;
 		}
-	.back-top.hidden {
-		animation: hidden 0.2s linear both;
+
+		animation: back-top-hidden 0.2s linear both;
+		&.active {
+			animation: back-top-active 0.2s linear both;
 		}
-	@keyframes active {
+		@keyframes back-top-active {
 			0% {
 				display: none;
 				opacity: 0;
-			transform: translateY(50px);
+				transform: translateY(15px);
 			}
 			100% {
 				opacity: 1;
 				transform: translateY(0);
 			}
 		}
-	@keyframes hidden {
+		@keyframes back-top-hidden {
 			0% {
 				opacity: 1;
 				transform: translateY(0);
 			}
 			100% {
 				opacity: 0;
-			transform: translateY(50px);
+				transform: translateY(15px);
 				display: none;
 			}
 		}
+	}
 </style>

src/components/header.vue

@@ -1,25 +0,0 @@
-<script setup lang="ts">
-import { ref, onMounted, onUnmounted, reactive, toRefs } from "vue";
-//const props = defineProps({
-//})
-//const emit = defineEmits([
-//])
-let data = reactive({
-})
-onMounted(()=>{
-})
-onUnmounted(()=>{
-})
-defineExpose({})
-const {} = toRefs(data);
-</script>
-<template>
-	<header class="header">
-	
-	</header>
-</template>
-<style lang="less" scoped>
-	.header{
-		position: relative;
-	}
-</style>

src/components/main-header.vue

@@ -0,0 +1,20 @@
+<template>
+	<header class="main-header" v-scroll-progress></header>
+</template>
+<script setup lang="ts">
+	import { ref, onMounted, onUnmounted } from "vue";
+</script>
+<style lang="less" scoped>
+	.main-header {
+		position: fixed;
+		width: 100%;
+		height: 85px;
+		top: 0;
+		left: 0;
+		z-index: 10000;
+		transition: background-color 0.2s linear;
+		&.active {
+			background-color: #0a0a0a;
+		}
+	}
+</style>

src/directives/index.ts

@@ -0,0 +1,10 @@
+import type { App } from 'vue'
+
+export default {
+	install(app: App) {
+		const directivesList = import.meta.glob('./*.ts', { eager: true }) as any;
+		Object.keys(directivesList).forEach(key => {
+			app.directive(directivesList[key].default.name, directivesList[key].default);
+		});
+	}
+};

src/directives/scroll-progress.ts

@@ -0,0 +1,63 @@
+/**
+ * 监听滚动条 滚动进度变化
+ * v-scroll-progress.self="(p) => console.log(p)"
+ * @modifiers self 监听当前元素的滚动进度变化
+ * @param params 滚动进度回调函数
+ * @param p 滚动进度
+ */
+const rootMap = new Map()
+export default {
+	name: 'scroll-progress',
+	mounted(el: HTMLElement, binding: any) {
+		const params = binding.value
+		const { self } = binding.modifiers
+		const paramsType = typeof params
+		const obj = {
+			onscroll: () => { },
+			el,
+			root: self ? el : document,
+			activeNum: 0,
+		};
+		if (paramsType === 'function') {
+			obj.onscroll = params
+		} else if (paramsType === 'object') {
+			if (params.onscroll) obj.onscroll = params.onscroll
+			if (params.GetRoot) obj.root = params.GetRoot()
+			if (params.hasOwnProperty('activeNum')) obj.activeNum = params.activeNum
+		}
+		requestAnimationFrame(() => handleScroll({ target: obj.root }))
+		if (rootMap.has(obj.root)) {
+			rootMap.get(obj.root).push(obj)
+			return
+		}
+		rootMap.set(obj.root, [obj])
+		obj.root.addEventListener('scroll', handleScroll)
+	},
+	beforeUnmount(el: HTMLElement, binding: any) {
+		rootMap.forEach((objs, root) => {
+			if (objs.some((v: any) => v.el === el)) {
+				objs = objs.filter((v_: any) => v_.el !== el)
+				rootMap.set(root, objs)
+			}
+			if (objs.length === 0) {
+				root.removeEventListener('scroll', handleScroll)
+				rootMap.delete(root)
+			}
+		})
+	},
+};
+function handleScroll(e: any) {
+	const target = e.target
+	const objs = rootMap.get(target)
+	if (!objs || objs.length === 0) return
+	const el = target === document ? document.documentElement : target as HTMLElement
+	const num = el.scrollTop / (el.scrollHeight - el.clientHeight);
+	const progress = Math.round(num * 100)
+	objs.forEach((obj: any) => {
+		obj?.onscroll(progress)
+		if (obj.el) {
+			let isActive = progress > obj.activeNum
+			obj.el.classList.toggle('active', isActive)
+		}
+	})
+};

src/main.ts

@@ -2,8 +2,13 @@ import { ViteSSG } from 'vite-ssg'
 import App from './App.vue'
 import { routes } from './routes'
 import './style.css'
+import directives from './directives/index'
 
+
+// 注册指令
 export const createApp = ViteSSG(App, {
 	routes,
 	base: import.meta.env.BASE_URL,
+}, ({ app }) => {
+	app.use(directives)
 })