element-plus/docs/examples/tabs/customized-trigger.vue

<template>
  <div style="margin-bottom: 20px">
    <el-button size="small" @click="addTab(editableTabsValue)">
      add tab
    </el-button>
  </div>
  <el-tabs
    v-model="editableTabsValue"
    type="card"
    closable
    @tab-remove="removeTab"
  >
    <el-tab-pane
      v-for="item in editableTabs"
      :key="item.name"
      :label="item.title"
      :name="item.name"
    >
      {{ item.content }}
    </el-tab-pane>
  </el-tabs>
</template>
<script lang="ts">
export default {
  data() {
    return {
      editableTabsValue: '2',
      editableTabs: [
        {
          title: 'Tab 1',
          name: '1',
          content: 'Tab 1 content',
        },
        {
          title: 'Tab 2',
          name: '2',
          content: 'Tab 2 content',
        },
      ],
      tabIndex: 2,
    }
  },
  methods: {
    addTab(targetName) {
      const newTabName = `${++this.tabIndex}`
      this.editableTabs.push({
        title: 'New Tab',
        name: newTabName,
        content: 'New Tab content',
      })
      this.editableTabsValue = newTabName
    },
    removeTab(targetName) {
      const tabs = this.editableTabs
      let activeName = this.editableTabsValue
      if (activeName === targetName) {
        tabs.forEach((tab, index) => {
          if (tab.name === targetName) {
            const nextTab = tabs[index + 1] || tabs[index - 1]
            if (nextTab) {
              activeName = nextTab.name
            }
          }
        })
      }

      this.editableTabsValue = activeName
      this.editableTabs = tabs.filter((tab) => tab.name !== targetName)
    },
  },
}
</script>