提交初始版本，使用vant ui库

miniprogram_npm/@vant/weapp/popup/index.wxml

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+<wxs src="../wxs/utils.wxs" module="utils" />
+<wxs src="./index.wxs" module="computed" />
+
+<import src="./popup.wxml" />
+
+<van-overlay
+  wx:if="{{ overlay }}"
+  show="{{ show }}"
+  z-index="{{ zIndex }}"
+  custom-style="{{ overlayStyle }}"
+  duration="{{ duration }}"
+  bind:click="onClickOverlay"
+  lock-scroll="{{ lockScroll }}"
+  root-portal="{{ rootPortal }}"
+/>
+
+<root-portal wx:if="{{ rootPortal }}">
+  <include src="./popup.wxml" />
+</root-portal>
+
+ <include wx:else src="./popup.wxml" />