apollo-upload-client/formDataAppendFile.mjs

A terminating Apollo Link for Apollo Client that fetches a GraphQL multipart request if the GraphQL variables contain files (by default FileList, File, or Blob instances), or else fetches a regular GraphQL POST or GET request (depending on the config and

// @ts-check

/** @import { ExtractableFile } from "./isExtractableFile.mjs" */

/**
 * The default implementation for the class `UploadHttpLink` constructor option
 * `formDataAppendFile` that uses the standard {@linkcode FormData.append}
 * method.
 * @param {FormData} formData Form data to append the specified file to.
 * @param {string} fieldName Field name for the file.
 * @param {ExtractableFile} file File to append.
 */
export default function formDataAppendFile(formData, fieldName, file) {
  "name" in file
    ? formData.append(fieldName, file, file.name)
    : formData.append(fieldName, file);
}