src/deferred.js
function deferred(options) {
  let args = null;
  const promise = new Promise((resolve, reject) => args = [resolve, reject, options]);
  promise.defer = function defer() {
    if (!args) throw new Error('defer has already been called');
    const callback = callbackBuilder.apply(undefined, args);
    args = null;
    return callback;
  };
  return promise;
}
function deferred(options) {
  let args = null;
  const promise = new Promise((resolve, reject) => args = [resolve, reject, options]);
  promise.defer = function defer() {
    if (!args) throw new Error('defer has already been called');
    const callback = callbackBuilder.apply(undefined, args);
    args = null;
    return callback;
  };
  return promise;
}
function deferred ( options ) { let args = null ; const promise = new Promise ( ( resolve , reject ) => args = [ resolve , reject , options ] ) ; promise . defer = function defer ( ) { if ( ! args ) throw new Error ( 'defer has already been called' ) ; const callback = callbackBuilder . apply ( undefined , args ) ; args = null ; return callback ; } ; return promise ; }
Create a capture context, similar to sync but without the global state.

@param {Boolean|String[]} options.variadic See the documentation for promisify.
Create a capture context similar to sync but without the global state .