10.19

2022-10-19 17:01:55 +08:00
commit 4f131cda36
466 changed files with 60382 additions and 0 deletions
--- a/src/components/BackToTop/index.vue
+++ b/src/components/BackToTop/index.vue
@@ -0,0 +1,111 @@
+<template>
+  <transition :name="transitionName">
+    <div v-show="visible" :style="customStyle" class="back-to-ceiling" @click="backToTop">
+      <svg width="16" height="16" viewBox="0 0 17 17" xmlns="http://www.w3.org/2000/svg" class="Icon Icon--backToTopArrow" aria-hidden="true" style="height:16px;width:16px"><path d="M12.036 15.59a1 1 0 0 1-.997.995H5.032a.996.996 0 0 1-.997-.996V8.584H1.03c-1.1 0-1.36-.633-.578-1.416L7.33.29a1.003 1.003 0 0 1 1.412 0l6.878 6.88c.782.78.523 1.415-.58 1.415h-3.004v7.004z" /></svg>
+    </div>
+  </transition>
+</template>
+
+<script>
+export default {
+  name: 'BackToTop',
+  props: {
+    visibilityHeight: {
+      type: Number,
+      default: 400
+    },
+    backPosition: {
+      type: Number,
+      default: 0
+    },
+    customStyle: {
+      type: Object,
+      default: function() {
+        return {
+          right: '50px',
+          bottom: '50px',
+          width: '40px',
+          height: '40px',
+          'border-radius': '4px',
+          'line-height': '45px',
+          background: '#e7eaf1'
+        }
+      }
+    },
+    transitionName: {
+      type: String,
+      default: 'fade'
+    }
+  },
+  data() {
+    return {
+      visible: false,
+      interval: null,
+      isMoving: false
+    }
+  },
+  mounted() {
+    window.addEventListener('scroll', this.handleScroll)
+  },
+  beforeDestroy() {
+    window.removeEventListener('scroll', this.handleScroll)
+    if (this.interval) {
+      clearInterval(this.interval)
+    }
+  },
+  methods: {
+    handleScroll() {
+      this.visible = window.pageYOffset > this.visibilityHeight
+    },
+    backToTop() {
+      if (this.isMoving) return
+      const start = window.pageYOffset
+      let i = 0
+      this.isMoving = true
+      this.interval = setInterval(() => {
+        const next = Math.floor(this.easeInOutQuad(10 * i, start, -start, 500))
+        if (next <= this.backPosition) {
+          window.scrollTo(0, this.backPosition)
+          clearInterval(this.interval)
+          this.isMoving = false
+        } else {
+          window.scrollTo(0, next)
+        }
+        i++
+      }, 16.7)
+    },
+    easeInOutQuad(t, b, c, d) {
+      if ((t /= d / 2) < 1) return c / 2 * t * t + b
+      return -c / 2 * (--t * (t - 2) - 1) + b
+    }
+  }
+}
+</script>
+
+<style scoped>
+.back-to-ceiling {
+  position: fixed;
+  display: inline-block;
+  text-align: center;
+  cursor: pointer;
+}
+
+.back-to-ceiling:hover {
+  background: #d5dbe7;
+}
+
+.fade-enter-active,
+.fade-leave-active {
+  transition: opacity .5s;
+}
+
+.fade-enter,
+.fade-leave-to {
+  opacity: 0
+}
+
+.back-to-ceiling .Icon {
+  fill: #9aaabf;
+  background: none;
+}
+</style>