add lib folder

lib/components/borderBox3/index.js

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+import './src/main.css'
+import BorderBox3 from './src/main.vue'
+
+export default function (Vue) {
+  Vue.component(BorderBox3.name, BorderBox3)
+}

lib/components/borderBox3/src/main.css

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+.dv-border-box-3 {
+  position: relative;
+  width: 100%;
+  height: 100%;
+}
+.dv-border-box-3 .dv-border-svg-container {
+  position: absolute;
+  width: 100%;
+  height: 100%;
+  top: 0px;
+  left: 0px;
+}
+.dv-border-box-3 .dv-border-svg-container polyline {
+  fill: none;
+  stroke: #2862b7;
+}
+.dv-border-box-3 .dv-bb3-line1 {
+  stroke-width: 3;
+}
+.dv-border-box-3 .dv-bb3-line2 {
+  stroke-width: 1;
+}
+.dv-border-box-3 .border-box-content {
+  position: relative;
+  width: 100%;
+  height: 100%;
+}

lib/components/borderBox3/src/main.vue

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+<template>
+  <div class="dv-border-box-3" :ref="ref">
+    <svg class="dv-border-svg-container" :width="width" :height="height">
+      <polyline class="dv-bb3-line1"
+        :points="`4, 4 ${width - 22} ,4 ${width - 22}, ${height - 22} 4, ${height - 22} 4, 4`" />
+      <polyline class="dv-bb3-line2"
+        :points="`10, 10 ${width - 16}, 10 ${width - 16}, ${height - 16} 10, ${height - 16} 10, 10`" />
+      <polyline class="dv-bb3-line2"
+        :points="`16, 16 ${width - 10}, 16 ${width - 10}, ${height - 10} 16, ${height - 10} 16, 16`" />
+      <polyline class="dv-bb3-line2"
+        :points="`22, 22 ${width - 4}, 22 ${width - 4}, ${height - 4} 22, ${height - 4} 22, 22`" />
+    </svg>
+
+    <div class="border-box-content">
+      <slot></slot>
+    </div>
+  </div>
+</template>
+
+<script>
+import autoResize from '../../../mixin/autoResize'
+
+export default {
+  name: 'DvBorderBox3',
+  mixins: [autoResize],
+  data () {
+    return {
+      ref: 'border-box-3'
+    }
+  }
+}
+</script>