初始版本提交

src/design/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();
+}