homework/js/Project/node_modules/react-router/modules/withRouter.js

import React from "react";
import PropTypes from "prop-types";
import hoistStatics from "hoist-non-react-statics";
import invariant from "tiny-invariant";

import RouterContext from "./RouterContext.js";

/**
 * A public higher-order component to access the imperative API
 */
function withRouter(Component) {
  const displayName = `withRouter(${Component.displayName || Component.name})`;
  const C = props => {
    const { wrappedComponentRef, ...remainingProps } = props;

    return (
      <RouterContext.Consumer>
        {context => {
          invariant(
            context,
            `You should not use <${displayName} /> outside a <Router>`
          );
          return (
            <Component
              {...remainingProps}
              {...context}
              ref={wrappedComponentRef}
            />
          );
        }}
      </RouterContext.Consumer>
    );
  };

  C.displayName = displayName;
  C.WrappedComponent = Component;

  if (__DEV__) {
    C.propTypes = {
      wrappedComponentRef: PropTypes.oneOfType([
        PropTypes.string,
        PropTypes.func,
        PropTypes.object
      ])
    };
  }

  return hoistStatics(C, Component);
}

export default withRouter;