gregfenton

Express: res.send() vs res.json() vs res.end()

Materials

• Article res.json() vs res.send() vs res.end() in Express
• MDN: Common MIME types

Key Takeaways

• When in doubt, use .send(). It dynamically sets Content-Type headers to match the data it sends.
• When sending JSON, you can either use .json() or .send().
  • .json() is likely less confusing
  • .json() uses .send() under the hood so the resulting HTTP headers are the same.

gregfenton

Express: Add "Hello World!" API

Prerequisites

1. Initialized ExpressJS project as per this gist

Example directory structure

project-root
    ├── node_modules
 ├── package-lock.json

gregfenton

import React, { useState, useEffect } from "react";
import {
  StyleSheet,
  Text,
  View,
  ActivityIndicator,
  Alert,
  Button,
} from "react-native";
import * as Location from "expo-location";