Getting TypeError: Cannot read property 'name' of undefined while using form-data

Question

I am using `node-fetch` and in my call I am using `form-data` my code looks something like below

```javascript
const fetch = require('node-fetch');
const FormData = require('form-data');
.
.
.
.
.
.
.
.

var form = new FormData();
form.append('sso_auth_token', token);

let res = await fetch(`xxxxxxxxxx`,
    {
        method: 'POST',
        body: form
    }
)
let json = await res.json();

```

When I run this code, I am getting following error even before the call is made

```javascript
TypeError: Cannot read property 'name' of undefined
    at FormData._getContentDisposition (/experimenta/foo/node_modules/form-data/lib/form_data.js:226:40)
    at FormData._multiPartHeader (/experimenta/foo/node_modules/form-data/lib/form_data.js:177:33)
    at FormData.append (/experimenta/foo/node_modules/form-data/lib/form_data.js:70:21)
```

How to fix this issue?

Eleven · Accepted Answer

This happens when some of the form value is undefined. I see in your code `token` is a variable. Make sure that is not undefined.

```javascript
form.append('sso_auth_token', (token || 'NA'));
```

Getting TypeError: Cannot read property 'name' of undefined while using form-data

1 Answer