fix: the error of calling extend to pass parameters #4844

[techbirds]

Instructions

fix the error of calling extend to pass parameters. Although this will not cause functional defects, it is logically unreasonable.

function createInstance(defaultConfig) {
  const context = new Axios(defaultConfig);
  const instance = bind(Axios.prototype.request, context);

  // Copy axios.prototype to instance
  utils.extend(instance, Axios.prototype, context, {allOwnKeys: true});

  // Copy context to instance
  // utils.extend(instance, context, {allOwnKeys: true}); -> utils.extend(instance, context, null, {allOwnKeys: true});
  utils.extend(instance, context, null, {allOwnKeys: true});

  // Factory for creating new instances
  instance.create = function create(instanceConfig) {
    return createInstance(mergeConfig(defaultConfig, instanceConfig));
  };

  return instance;
}