下拉框如何实现鼠标收起

要实现下拉框鼠标收起的功能，可以通过设置下拉框的dropDownVisible属性为false来实现。根据提供的代码，可以在watch中监听menuIDList的变化，然后通过this.$refs.cascader.dropDownVisible = false来将下拉框收起。具体代码如下：

watch: {
  menuIDList() {
    if (this.$refs.cascader) {
      this.$refs.cascader.dropDownVisible = false;
    }
  }
}

这样，当menuIDList的值发生变化时，下拉框就会自动收起。
#### 引用[.reference_title]
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