vue3的watch一次性监听多个值

1、父组件传过来的props,直接监听props

  watch(props, () => {
    if (props.a) {
      getList();
    }
  });

2、监听当前页面多个值，或者只监听props当中的两个值

  watch(() => [props.a, state.b], (newValue, oldValue) => {
    state.a= newValue[0];
    state.c= newValue[1];
  });

3、监听单个值

  watch(() => props.a, (newValue, oldValue) => {
    state.a= newValue
  });