How do I pass array as a key in JavaScript object?

Question

I have an API that expects specialities[] in the request body. The problem is that I don't know how to pass this as key in javascript.

This is what I'm doing:

const data = {
      name: name,
      phone: phone,
      email: registerEmail,
      pmc_number: pmcNumber,
      speciality[]: speciality.split(","),
      city: city 
    }

    const {res} = await axios.post("api-url", data);

But, speciality[] gives syntax error. So, is there any way I can send the data to the API (the API can't be changed. I have to find the solution from the client side). Thanks.

The key isn't supposed to be a type, it should be an identifier. The type can be whatever you assign it. .split() already creates an array, so just remove the [] from the key name. If the api requires you to include the [] in the key name then just quote the key so it's a string. — h0r53
– h0r53, Commented Sep 13, 2022 at 15:25
Put quotes around object keys that contain special characters. "speciality[]": value — James
– James, Commented Sep 13, 2022 at 15:28

Unmitigated · Accepted Answer · 2022-09-13 15:25:46Z

1

You can put quotes around the key.

'specialities[]': speciality.split(","),

answered Sep 13, 2022 at 15:25

Unmitigated

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2 Comments

pilchard Over a year ago

close for clarity, it looks like the OP is confusing type annotations with property names.

h0r53 Over a year ago

Though if for some reason the API requires specialties[] as a key, then this answer seems appropriate. If the OP has any control over the API I would highly recommend removing [] from the key though.

TylerH · Accepted Answer · 2022-11-04 13:30:49Z

1

'specialities': speciality.split(',') describes the property using quotes and not a name, like in JSON.

However, it is not passing a list/array.
An array is stringified: for example, String([1,2])=='1,2';. So String([])=='', and in a property, which is a string or symbol type, does it make much of a a difference?

edited Nov 4, 2022 at 13:30

TylerH

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answered Sep 13, 2022 at 15:30

user19987349

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