数组插入元素到选择元素的后面

/**
 * 复制题目
 * @param data
 * @param index
 */
copyQuestion (data, index) {
  const newData = JSON.parse(JSON.stringify(data))
  newData.uid = `${newData.componentType}-${Math.floor(Math.random() * 1000000)}`
  this.questionList.splice(index + 1, 0, newData)
  for (const item of this.questionList) {
    item.active = item.uid === newData.uid
  }
},