@plantinformatics/vcf-genotype-brapi/src/utils/data/promisify.js

Client and server functions to access genotype data from VCF via a custom web API and BrAPI

export { promisifyFn };
/** from https://javascript.info/promisify */
function promisifyFn(f) {
  return function (...args) { // return a wrapper-function (*)
    return new Promise((resolve, reject) => {
      function callback(err, result) { // our custom callback for f (**)
        if (err) {
          reject(err);
        } else {
          resolve(result);
        }
      }

      args.push(callback); // append our custom callback to the end of f arguments

      f.call(this, ...args); // call the original function
    });
  };
}