Vue：Invalid prop: type check failed for prop "clearable". Expected Boolean, got String

輸入框為了能清除內容加了clearable屬性，設置clearable=true或者clearable="true"，出現以下提示錯誤：

Invalid prop: type check failed for prop "clearable". Expected Boolean, got String with value "true"

解決辦法是，設置clearable時不用加true或者"true"，如下所示：

<el-input
  placeholder="請輸入內容"
  v-model="input"
  clearable>
</el-input>

出現以下錯誤：

Property or method "attr" is not defined on the instance but referenced during render. Make sure that this property is reactive

表示attr屬性或方法沒有定義，在data或methods中定義即可。