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1. The element-ui component selector of vuejs2.0 cannot display the selected content

2、`<template>
<el-select v-model="value4" clearable placeholder="Please select">

<el-option
  v-for="item in options"
  :label="item.label"
  :value="item.value">
</el-option>

</el-select>
</template>

<script>
export default {

data() {
  return {
    options: [{
      value: '選項1',
      label: '黃金糕'
    }, {
      value: '選項2',
      label: '雙皮奶'
    }, {
      value: '選項3',
      label: '蚵仔煎'
    }, {
      value: '選項4',
      label: '龍須面'
    }, {
      value: '選項5',
      label: '北京烤鴨'
    }],
    value4: ''
  }
}

}
</script>`

3. There is no problem in the official website implementation. Problems occur when leaving the official website platform. The same situation occurs when downloading a demo on GitHub.

4. Please ask friends who have been through the pit to help guide you. . .