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packages/badge/index.js

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+import Badge from './src/main';
+
+/* istanbul ignore next */
+Badge.install = function(Vue) {
+  Vue.component(Badge.name, Badge);
+};
+
+export default Badge;

packages/badge/src/main.vue

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+<template>
+  <div class="el-badge">
+    <slot></slot>
+    <transition name="el-zoom-in-center">
+      <sup
+        v-show="!hidden && (content || content === 0 || isDot)"
+        v-text="content"
+        class="el-badge__content"
+        :class="[
+          'el-badge__content--' + type,
+          {
+            'is-fixed': $slots.default,
+            'is-dot': isDot
+          }
+        ]">
+      </sup>
+    </transition>
+  </div>
+</template>
+
+<script>
+export default {
+  name: 'ElBadge',
+
+  props: {
+    value: [String, Number],
+    max: Number,
+    isDot: Boolean,
+    hidden: Boolean,
+    type: {
+      type: String,
+      validator(val) {
+        return ['primary', 'success', 'warning', 'info', 'danger'].indexOf(val) > -1;
+      }
+    }
+  },
+
+  computed: {
+    content() {
+      if (this.isDot) return;
+
+      const value = this.value;
+      const max = this.max;
+
+      if (typeof value === 'number' && typeof max === 'number') {
+        return max < value ? `${max}+` : value;
+      }
+
+      return value;
+    }
+  }
+};
+</script>