使用默认值进行解构后,“Object可能为空”

我对打字很陌生。我有一个这样的界面:

export interface Stop {
  sequenceNumber?: number | null;
}

  stops.sort((stopA: Stop, stopB: Stop) => {
    const { sequenceNumber: seqA = 0 } = stopA;
    const { sequenceNumber: seqB = 0 } = stopB;
    return seqA - seqB;
  });

它抱怨 Object is possibly 'null' 两者都有 seqA seqB 0 . 为什么会这样,人们通常如何克服?

const seqA = stopA.sequenceNumber || 0;
const seqB = stopB.sequenceNumber || 0;

Typescript不会抱怨。两种方法不都能有效地做同样的事情吗?