Updating array with fetch put


I have a post object on server which contains array of likes

Screenshot 2022-10-25 185831

how do I increase or decrease its length with fetch put method?

export function addLike() {
    "https://nomoreparties.co/v1/" +
      `${cohortId}` +
      "/cards" +
      "/" +
      method: "PUT",
      headers: apiConfig.headers,
      body: JSON.stringify({
        _id: apiConfig.id,
        likes: likes.push(1),
    .then((response) => response.json())
    .then((json) => console.log(json));

When I call this function I get Uncaught ReferenceError: likes is not defined, but it’s there! The idea was to push one random element to likes array to increase it’s length(likes count)

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