perf: 未加载的chart显示背景和title

nezha-fronted/src/components/charts/chart-single-stat.vue

@@ -5,7 +5,7 @@
   <div class="nz-chart-resize">
     <div class="resize-shadow" ref="resizeShadow"></div>
     <div class="resize-box resize-box-single" ref="resizeBox">
-      <div class="chart-single-stat"  :id="'chartSingleStatDiv'+chartIndex" v-show="divFirstShow" @mouseenter="caretShow=true" @mouseleave="caretShow=false">
+      <div class="chart-single-stat"  :id="'chartSingleStatDiv'+chartIndex" @mouseenter="caretShow=true" @mouseleave="caretShow=false">
         <loading  :ref="'localLoading'+chartIndex"></loading>
         <div class="clearfix chartTitle" :class="{'dragTitle':dragTitleShow}" :id="'chartTitle'+chartIndex">
           <el-popover
@@ -20,10 +20,10 @@
               <span class="panel-info-corner-inner"></span>
             </span>
           </el-popover>
-          <el-dropdown trigger="click" v-show="firstShow"   class="nz-chart-top" :key="'chartDropdown'+chartIndex"  v-clickoutside="clickos">
+          <el-dropdown trigger="click" class="nz-chart-top" :key="'chartDropdown'+chartIndex"  v-clickoutside="clickos">
             <el-dropdown-menu style="display: none"></el-dropdown-menu>
             <span class="el-dropdown-link chart-title" @click="dropdownMenuShow=!dropdownMenuShow">
-              <span class="chart-title-text">{{data.title}}</span>
+              <span class="chart-title-text">{{chartData.title}}</span>
               <span class="chart-title-icon"><i class="el-icon-caret-bottom el-icon--right"  :class="{'visible':caretShow,'hidden':!caretShow}"></i></span>
             </span>
             <ul slot="dropdown" v-show="dropdownMenuShow"  :id="'dropdownUl'+chartIndex"  class="el-dropdown-menu nz-chart-dropdown"  style="position: absolute; top: 30px; left: calc(50% - 79px); transform-origin: center top; z-index: 1000;" >
@@ -84,6 +84,9 @@ export default {
     'time-picker':timePicker
   },
   props: {
+    chartData: {
+      type: Object
+    },
     // 看板id
     panelId: {
       type: Number,