vue

<template>
  <div
    ref="progressBar"
    class="progress-bar"
    :style="{ width: progress + '%' }"
  ></div>
</template>

<script setup>
import { ref, onMounted, onUnmounted } from "vue";

const progressBar = ref(null);
const progress = ref(0);

let ticking = false;

const handleScroll = () => {
  if (!ticking) {
    requestAnimationFrame(() => {
      const { documentElement, body } = document;
      // 批量读取
      const measurements = {
        scrollHeight: documentElement.scrollHeight,
        clientHeight: documentElement.clientHeight,
        scrollTop: documentElement.scrollTop || body.scrollTop,
      };
      const totalHeight = measurements.scrollHeight - measurements.clientHeight;
      // 批量更新
      progress.value = (measurements.scrollTop / totalHeight) * 100;
      ticking = false;
    });
    ticking = true;
  }
};

onMounted(() => {
  window.addEventListener("scroll", handleScroll);
});

onUnmounted(() => {
  window.removeEventListener("scroll", handleScroll);
});
</script>

<style scoped>
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(
    107deg,
    rgb(255, 182, 133) -30.6%,
    rgb(255, 111, 29) -1.11%,
    rgb(252, 181, 232) 39.14%,
    rgb(135, 148, 255) 73.35%,
    rgb(60, 112, 255) 97.07%,
    rgb(60, 112, 255) 118.97%
  );
  z-index: 9999;
}
</style>

vue

<script setup lang="ts" name="TeekLayoutProvider">
// @ts-ignore
import ScrollProgressBar from "./ScrollProgressBar.vue"; //导入顶部滚动条组件
</script>

<template>
  <Teek.Layout>
    <template #layout-top>
      <!-- 顶部滚动条组件 -->
      <ScrollProgressBar />
    </template>
    其他组件...
  </Teek.Layout>
</template>