src/lib/upload.js


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export const upload = async (file, type, progress) => {
  let url = `/api/upload/${type}`;
  let formData = new FormData();
  formData.append("file", file);

  return new Promise((resolve, reject) => {
    let ajax = new XMLHttpRequest();
    ajax.addEventListener("load", () => {
      if (ajax.readyState === ajax.DONE) {
        if (ajax.status === 200) resolve(ajax.response);
        else reject(new Error(`Upload failed: ${ajax.response}`));
      }
    });
    ajax.upload.addEventListener("progress", progress, false);
    ajax.open("POST", url);
    ajax.send(formData);
  });
};