Add animation less back

src/App.vue

@@ -81,3 +81,7 @@
     document.removeEventListener('mousedown', timekeeping);
   });
 </script>
+
+<style lang="less">
+  @import 'styles/index.less';
+</style>

src/styles/index.less

@@ -0,0 +1 @@
+@import 'transition/index.less';

src/styles/transition/base.less

@@ -0,0 +1,18 @@
+.transition-default() {
+  &-enter-active,
+  &-leave-active {
+    transition: 0.3s cubic-bezier(0.25, 0.8, 0.5, 1) !important;
+  }
+
+  &-move {
+    transition: transform 0.4s;
+  }
+}
+
+.expand-transition {
+  .transition-default();
+}
+
+.expand-x-transition {
+  .transition-default();
+}

src/styles/transition/fade.less

@@ -0,0 +1,81 @@
+.fade-enter-active,
+.fade-leave-active {
+  transition: opacity 0.2s ease-in-out;
+}
+
+.fade-enter-from,
+.fade-leave-to {
+  opacity: 0;
+}
+
+/* fade-slide */
+.fade-slide-leave-active,
+.fade-slide-enter-active {
+  transition: all 0.3s;
+}
+
+.fade-slide-enter-from {
+  opacity: 0;
+  transform: translateX(-30px);
+}
+
+.fade-slide-leave-to {
+  opacity: 0;
+  transform: translateX(30px);
+}
+
+// ///////////////////////////////////////////////
+// Fade Bottom
+// ///////////////////////////////////////////////
+
+// Speed: 1x
+.fade-bottom-enter-active,
+.fade-bottom-leave-active {
+  transition: opacity 0.25s, transform 0.3s;
+}
+
+.fade-bottom-enter-from {
+  opacity: 0;
+  transform: translateY(-10%);
+}
+
+.fade-bottom-leave-to {
+  opacity: 0;
+  transform: translateY(10%);
+}
+
+// fade-scale
+.fade-scale-leave-active,
+.fade-scale-enter-active {
+  transition: all 0.28s;
+}
+
+.fade-scale-enter-from {
+  opacity: 0;
+  transform: scale(1.2);
+}
+
+.fade-scale-leave-to {
+  opacity: 0;
+  transform: scale(0.8);
+}
+
+// ///////////////////////////////////////////////
+// Fade Top
+// ///////////////////////////////////////////////
+
+// Speed: 1x
+.fade-top-enter-active,
+.fade-top-leave-active {
+  transition: opacity 0.2s, transform 0.25s;
+}
+
+.fade-top-enter-from {
+  opacity: 0;
+  transform: translateY(8%);
+}
+
+.fade-top-leave-to {
+  opacity: 0;
+  transform: translateY(-8%);
+}

src/styles/transition/index.less

@@ -0,0 +1,10 @@
+@import './base.less';
+@import './fade.less';
+@import './scale.less';
+@import './slide.less';
+@import './scroll.less';
+@import './zoom.less';
+
+.collapse-transition {
+  transition: 0.2s height ease-in-out, 0.2s padding-top ease-in-out, 0.2s padding-bottom ease-in-out;
+}

src/styles/transition/scale.less

@@ -0,0 +1,21 @@
+.scale-transition {
+  .transition-default();
+
+  &-enter-from,
+  &-leave,
+  &-leave-to {
+    opacity: 0;
+    transform: scale(0);
+  }
+}
+
+.scale-rotate-transition {
+  .transition-default();
+
+  &-enter-from,
+  &-leave,
+  &-leave-to {
+    opacity: 0;
+    transform: scale(0) rotate(-45deg);
+  }
+}

src/styles/transition/scroll.less

@@ -0,0 +1,67 @@
+.scroll-y-transition {
+  .transition-default();
+
+  &-enter-from,
+  &-leave-to {
+    opacity: 0;
+  }
+
+  &-enter-from {
+    transform: translateY(-15px);
+  }
+
+  &-leave-to {
+    transform: translateY(15px);
+  }
+}
+
+.scroll-y-reverse-transition {
+  .transition-default();
+
+  &-enter-from,
+  &-leave-to {
+    opacity: 0;
+  }
+
+  &-enter-from {
+    transform: translateY(15px);
+  }
+
+  &-leave-to {
+    transform: translateY(-15px);
+  }
+}
+
+.scroll-x-transition {
+  .transition-default();
+
+  &-enter-from,
+  &-leave-to {
+    opacity: 0;
+  }
+
+  &-enter-from {
+    transform: translateX(-15px);
+  }
+
+  &-leave-to {
+    transform: translateX(15px);
+  }
+}
+
+.scroll-x-reverse-transition {
+  .transition-default();
+
+  &-enter-from,
+  &-leave-to {
+    opacity: 0;
+  }
+
+  &-enter-from {
+    transform: translateX(15px);
+  }
+
+  &-leave-to {
+    transform: translateX(-15px);
+  }
+}

src/styles/transition/slide.less

@@ -0,0 +1,39 @@
+.slide-y-transition {
+  .transition-default();
+
+  &-enter-from,
+  &-leave-to {
+    opacity: 0;
+    transform: translateY(-15px);
+  }
+}
+
+.slide-y-reverse-transition {
+  .transition-default();
+
+  &-enter-from,
+  &-leave-to {
+    opacity: 0;
+    transform: translateY(15px);
+  }
+}
+
+.slide-x-transition {
+  .transition-default();
+
+  &-enter-from,
+  &-leave-to {
+    opacity: 0;
+    transform: translateX(-15px);
+  }
+}
+
+.slide-x-reverse-transition {
+  .transition-default();
+
+  &-enter-from,
+  &-leave-to {
+    opacity: 0;
+    transform: translateX(15px);
+  }
+}

src/styles/transition/zoom.less

@@ -0,0 +1,27 @@
+// zoom-out
+.zoom-out-enter-active,
+.zoom-out-leave-active {
+  transition: opacity 0.1 ease-in-out, transform 0.15s ease-out;
+}
+
+.zoom-out-enter-from,
+.zoom-out-leave-to {
+  opacity: 0;
+  transform: scale(0);
+}
+
+// zoom-fade
+.zoom-fade-enter-active,
+.zoom-fade-leave-active {
+  transition: transform 0.2s, opacity 0.3s ease-out;
+}
+
+.zoom-fade-enter-from {
+  opacity: 0;
+  transform: scale(0.92);
+}
+
+.zoom-fade-leave-to {
+  opacity: 0;
+  transform: scale(1.06);
+}