addDoc是异步操作。您需要使用await关键字来暂停代码的执行，直到添加文档为止。否则docRef将不代表您的文档。

try {
  const docRef = await addDoc(collection(db, "users"), {
    name: "Alan",
  });
  console.log('yyyyy');
  console.log("Document written with ID: ", docRef.id);
} catch (e) {
  console.error("Error adding document: ", e);
}

试试那个

try {
  console.log
  const docRef = addDoc(collection(db, "users"), {
    name: "Alan",
    //middle: "Mathison",
    //last: "Turing",
    //born: 1912
  }).then(res => {
    console.log('yyyyy');
    console.log("Document written with ID: ", docRef.id);
  });
  
} catch (e) {
  console.error("Error adding document: ", e);
}

这个应该可以。您可以删除过多的console.logs

import { collection, addDoc } from "firebase/firestore"; 

const docRef = await addDoc(collection(db, "users"), {
  name: "Alan"
});
console.log("Document written with ID: ", docRef.id);