即使已发送响应，节点也会继续执行

Question

I have something along the lines of the below code:

const checkForSpaces = text => !/\s/g.test(text)

const verifyLink = async (res) => {
    return res.status(400).end()
}

router.post("/", async (req, res) => {
    const { email, password, verifyToken } = req.body

    if (verifyingAdmin) {
        await verifyLink(res, verifyToken)
    }

    // Code below this line should not be reached
    try {
        if (!checkForSpaces(email)) {
          return res.status(400).json({ msg: "Email cannot have spaces" })
        }
    . . . .

There is a use case where email and password are null and in that use case, in verifyLink , I send a response back to the frontend, however I run into an error, Cannot read property 'trim' of null for the obvious reason that those aforementioned fields are null . What am I doing wrong here?

Answer 1

The execution goes on because you don't return from the function. Just add a return after await verifyLink(res, verifyToken) . The return in verifyLink will only end the execution of the verifyLink function, not of the parent function.