fetch-language.js

// @flow
async function fetchLanguage(lang: string, fields: Array<string>) {
  await response = fetch({
    method: "POST",
    headers: {
      "content-type": "application/json"
    },
    body: JSON.stringify({
      query: `
        query FetchLanguage($lang: String!) {
          languageDictionary(lang: $lang) {
            ${fields.join(", ")}
          }
        }
      `,
      arguments: {
        lang
      }
    }),
  });
  const { data } = await response.json();
  return data.languageDictionary;
}