How to send object via formData to axios?

Question

React

The problem is that I give the file and the object.
And it turns out that I'm sending this:
file: (binary)
text: [object Object]
How can I send an object in JSON format right away?
Turning the object into a string, sending it to the server is not an option, since I receive this object as a string and there is already another problem parsing JSON. parse (obj) produces A cross-origin error was thrown. React doesn't have access to the actual error object in development. It's just string parsing though.

const instance = axios.create({
    baseURL: 'https://url/',
    headers: {
        Authorization: 'Bearer ' + localStorage.getItem('Token')
    }
})
export const coursesAPI = {
    createTheory(data) {
        const formData = new FormData()
        formData.append('image', data.image) //File
        formData.append('text', data.text) //Object
        return instance.post(`endpoint/`, formData).then((data) => {
            return data.data;
        })
    },
}

Answer 1

The question is closed. Added formData.append('text', JSON.stringify(data.text))
export const coursesAPI = {
createTheory(data) {
const formData = new FormData()
formData.append('image', data.image) //File
formData.append('text', formData.append('text', JSON.stringify(data.text))) //Object
return instance.post(`endpoint/`, formData).then((data) => {
return data.data;
})
},
}