setTimeout in NodeJS /Express throws TypeError: Cannot read property 'client' of undefined

Question

I have the following basic express route in nodejs:

app.get('/timeout', function (req, res) {
    setTimeout(() => {
      console.log('timeout');
    }, 2000);

    res.send({ hello: "world" });
  });

It doesn't work, it throws an error

TypeError: Cannot read property 'client' of undefined at setTimeout (/Users/myproject/node_modules/@sendgrid/mail/src/classes/mail-service.js:58:10) at /Users/myproject/router.js:87:7

I don't understand why? I have tried not doing a console.log, I tried arrow functions, async await, not sending res.send. What client is meant here?

The other thing that confuses me is that the first line of the error mentions a sendgrid module -which I do have installed, but which I'm not using in this route at all- : at setTimeout (/Users/myproject/node_modules/@sendgrid/mail/src/classes/mail-service.js:58:10)

R. Kohlisch · Accepted Answer · 2020-12-27 13:14:00Z

2

I'm so sorry, I found the error! My VS-Code auto-imported a setTimeout function from sendgrid. This is not the standard setTimeout function, so it threw an error. Didn't see it imported this automatically.

const { setTimeout } = require('@sendgrid/mail');

answered Dec 27, 2020 at 13:14

R. Kohlisch

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