no-empty-character-class problem

[Mister-Hope]

Here is my code.

  get pText() {
    return this.text.replace(/\n/gu, '<br/>').replace(/\s/gu, '&ensp;');
  }

And I got the hint

WARNING in U:/vue/src/components/BaseP.vue
35:30 don't use empty classes in regular expressions
    33 |   // 对text进行处理以在网页上正常显示空格与换行
    34 |   get pText() {
  > 35 |     return this.text.replace(/\n/gu, '<br/>').replace(/\s/gu, '&ensp;');
       |                              ^
    36 |   }
    37 | 
    38 |   // 图片加载状态
WARNING in U:/vue/src/components/BaseP.vue
35:55 don't use empty classes in regular expressions
    33 |   // 对text进行处理以在网页上正常显示空格与换行
    34 |   get pText() {
  > 35 |     return this.text.replace(/\n/gu, '<br/>').replace(/\s/gu, '&ensp;');
       |                                                       ^
    36 |   }
    37 | 
    38 |   // 图片加载状态
WARNING in U:/vue/src/components/BaseTimeAxis.vue
42:42 don't use empty classes in regular expressions
    40 | 
    41 |     this.timeList.forEach((element, index) => {
  > 42 |       list[index] = element.text.replace(/\n/gu, '<br/>').replace(/\s/gu, '&ensp;');
       |                                          ^
    43 |     });
    44 | 
    45 |     return list;
WARNING in U:/vue/src/components/BaseTimeAxis.vue
42:67 don't use empty classes in regular expressions
    40 | 
    41 |     this.timeList.forEach((element, index) => {
  > 42 |       list[index] = element.text.replace(/\n/gu, '<br/>').replace(/\s/gu, '&ensp;');
       |                                                                   ^
    43 |     });
    44 | 
    45 |     return list;

I don't think it has a empty class, or could anyone tell me how to write \n and \s inroder to prevent this error?