vue-fastify-twitter-api

This is a basic example Vue 3 application with a Fastify backend in order to communicate with the Twitter API.

The frontend is made with Vite create app. The backend is from the fastify-typescript-starter.

Currently uses node-twitter-api-v2 library to call Twitter

Backend

You need to create a file in the /backend folder called .env and add your Twitter bearer token to it

/backend/.env

TWITTER_BEARER_TOKEN = XXX

Install dependencies:

cd backend
pnpm i

Open two terminals:

pnpm watch

pnpm dev

Looking at twitterController.ts we have a basic route that accepts a username

$ curl localhost:4200/twitter/user/just_some_d00d                     
{"data":{"id":"2399226205","name":"𝙙00𝙙","username":"just_some_d00d"}}

$ curl localhost:4200/twitter/user/jack                                
{"data":{"id":"12","name":"jack⚡️","username":"jack"}}

So, how do we get this data on our frontend?

Frontend

Install deps:

cd frontend
pnpm i

Create two components:

touch components/TwitterInput.vue
touch components/TwitterOutput.vue

TwitterInput.vue

import { ref } from "vue";
defineEmits(["twitterUsername"]);
const twitterUsername = ref("");
</script>

<template>
  <input
    type="text"
    v-model="twitterUsername"
    placeholder="Enter username"
    class="twitter__input"
  />
  <button
    class="twitter__button"
    @click="$emit('twitterUsername', twitterUsername)"
  >
    Submit
  </button>
  <hr>
</template>

<style scoped>
hr {
    border: none;
    background: #1DA1F2;
    height: 1px;
    margin: 1rem;
}
.twitter__input {
  padding: 0.5rem;
}
.twitter__button {
    background: none;
    border: n
    one;
    box-shadow: 0 0 0 1px #1DA1F2;
    border-radius: 4px;
    margin-left: 2rem;
    padding: 0.5rem 1rem;
    transition: all 300ms ease-in-out;
}

.twitter__button:hover {
    box-shadow: 0 0 0 2px #1DA1F2;
}
</style>

TwitterOutput.vue

<script lang="ts" setup>
defineProps<{
    twitterData: {}
}>()
</script>

<template>
    {{ twitterData }}
</template>

App.vue

<script setup lang="ts">
import { ref } from 'vue'
import TwitterInput from './components/TwitterInput.vue';
import TwitterOutput from './components/TwitterOutput.vue';
const twitterData = ref({})
function getUsernameData(twitterUsername: string) {
  fetch(
    `http://localhost:4200/twitter/user/${twitterUsername}`
  )
    .then(response => response.json())
    .then(data => twitterData.value = data)
}
</script>

<template>
  <TwitterInput @twitter-username="getUsernameData($event)" />
  <TwitterOutput :twitter-data="twitterData" />
</template>

<style>
#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>

Ooops, CORS!

cd ../backend
pnpm add fastify-cors

Update backend/src/app.ts

import fastify from "fastify";
import fastifyEnv from "fastify-env";
import fastifyCors from "fastify-cors";
import router from "./router";

const schema = {
  type: 'object',
  required: [ 'PORT' ],
  properties: {
    PORT: {
      type: 'string',
      default: 4200
    }
  }
}

const options = {
  dotenv: true,
  schema: schema,
}

const server = fastify({
  // Logger only for production
  logger: !!(process.env.NODE_ENV !== "development"),
});

// Middleware: Router
server.register(fastifyEnv, options);
server.register(router);
server.register(fastifyCors);

export default server;