add backToTop button

2026-05-13 23:16:46 +00:00 · 2024-08-06 17:46:59 +08:00
parent a1b7f80017
commit 348192f1b9
3 changed files with 69 additions and 2 deletions
--- a/src/assets/global.css
+++ b/src/assets/global.css
@@ -123,3 +123,33 @@
    display: block;
  }
 }
+
+#back-to-top {
+  position: fixed;
+  bottom: 20px;
+  right: 20px;
+  background-color: #dfd3c3;
+  color: #333;
+  width: 50px;
+  height: 50px;
+  border-radius: 50%;
+  border: none;
+  cursor: pointer;
+  display: none; /* 初始状态隐藏 */
+  align-items: center;
+  justify-content: center;
+  font-size: 24px;
+  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
+  z-index: 1000;
+  transition: all 0.3s ease; /* 添加过渡效果 */
+}
+
+#back-to-top:hover {
+  background-color: #d0c3b4; /* 稍微深一点的颜色作为悬停效果 */
+  transform: translateY(-3px); /* 悬停时稍微上移 */
+}
+
+#back-to-top:active {
+  transform: translateY(1px); /* 点击时下移，创造按压效果 */
+  box-shadow: 0 1px 5px rgba(0, 0, 0, 0.2); /* 减小阴影 */
+}
--- a/src/layouts/base.astro
+++ b/src/layouts/base.astro
@@ -73,7 +73,9 @@ const FOOTER_INJECT = getEnv(import.meta.env, Astro, 'FOOTER_INJECT')
      {...seoParams}
    />
    <Fragment set:html={HEADER_INJECT} />
-  </head>
+    <script src="src/lib/backToTop.js" type="module"></script></head
+  >
+
  <body>
    <div id="wrapper">
      <div id="container">
@@ -123,7 +125,19 @@ const FOOTER_INJECT = getEnv(import.meta.env, Astro, 'FOOTER_INJECT')
        </div>
      </div>
    </div>
-
+    <button id="back-to-top" aria-label="Back to top" title="Back to top">
+      <svg
+        xmlns="http://www.w3.org/2000/svg"
+        viewBox="0 0 24 24"
+        fill="none"
+        stroke="currentColor"
+        stroke-width="2"
+        stroke-linecap="round"
+        stroke-linejoin="round"
+      >
+        <polyline points="18 15 12 9 6 15"></polyline>
+      </svg>
+    </button>
    <Fragment set:html={FOOTER_INJECT} />
  </body>
 </html>
--- a/src/lib/backToTop.js
+++ b/src/lib/backToTop.js
@@ -0,0 +1,23 @@
+function setupBackToTop() {
+  const backToTopButton = document.querySelector('#back-to-top')
+
+  // Toggle button visibility based on scroll position
+  const toggleBackToTopButton = () => {
+    backToTopButton.style.display = window.scrollY > 300 ? 'flex' : 'none'
+  }
+
+  // Attach scroll event listener to window
+  window.addEventListener('scroll', toggleBackToTopButton)
+  toggleBackToTopButton() // Initial check for button visibility
+
+  // Smooth scroll to top when button is clicked
+  backToTopButton.addEventListener('click', () => {
+    window.scrollTo({
+      top: 0,
+      behavior: 'smooth',
+    })
+  })
+}
+
+// Initialize the functionality once page is fully loaded
+document.addEventListener('DOMContentLoaded', setupBackToTop)