在 then 中调用 await

Question

我有以下代码...

  run(cert).then( serverPop => {
    const popInt = parseInt(serverPop);
    console.log("The new pop resport is: " + serverPop);
    if (oldPop < popInt) {
      let addDB = "https://www.website.com/u.php?o=" + oldPop + "&c=" + cert + "&n=" + popInt;
      const popIntoDoResponse = await axios.get(addDB); //error here
      res.json({
        ack: "success",
        message: "POP IS UPDATED",
        pop: popInt,
        serverResponse: popIntoDoResponse.data
      });
    } else {
      res.json({
        ack: "success",
        message: "POP IS THE SAME",
        pop: popInt
      });
    }

我在日志中得到以下指向await

await 只在 async 函数中有效

Answer 1

你在 then 方法中错过了async。

run(cert).then(async (serverPop) => { // add `async`
    const popInt = parseInt(serverPop);
    console.log("The new pop resport is: " + serverPop);
    if (oldPop < popInt) {
      let addDB = "https://www.website.com/u.php?o=" + oldPop + "&c=" + cert + "&n=" + popInt;
      const popIntoDoResponse = await axios.get(addDB); //error here
      res.json({
        ack: "success",
        message: "POP IS UPDATED",
        pop: popInt,
        serverResponse: popIntoDoResponse.data
      });
    } else {
      res.json({
        ack: "success",
        message: "POP IS THE SAME",
        pop: popInt
      });
    }