[typescript]error: The left-hand side of an assignment expression may not be an optional property access.

错误：
    The left-hand side of an assignment expression may not be an optional property access.


代码：

businessName.value = null;
counselorName.value = null;
resInfName.value = null;


解决方案：

使用类型断言, 把null 和 undefined的值都排除掉, 代码如下：
businessName!.value = null;
counselorName!.value = null;
resInfName!.value = null;