概要

今回は右側にニュース欄を加えます。
News APIからニュース情報を取得
「Show more」ボタンを押すと表示するニュース件数を３件増やす

開発環境

OS:Windows10
IDE:VSCode

package.json

{
  "name": "",
  "private": true,
  "scripts": {
    "dev": "next dev",
    "build": "next build",
    "start": "next start",
    "lint": "next lint"
  },
  "dependencies": {
    "@heroicons/react": "^1.0.6",
    "next": "12.0.9",
    "react": "17.0.2",
    "react-dom": "17.0.2"
  },
  "devDependencies": {
    "@types/node": "^20.4.2",
    "@types/react": "^18.2.15",
    "autoprefixer": "^10.4.2",
    "eslint": "8.8.0",
    "eslint-config-next": "12.0.9",
    "postcss": "^8.4.5",
    "tailwindcss": "^3.0.18"
  }
}

実装のポイント

NewsAPIでデータ取得してブラウザ上で表示

show moreボタンを押すと表示件数が+3される　表示件数の変数をuseEffectにする

コード部分

News

News.jsx

export default function News({article}){
    return(
        <a href={article.url} target="_blank">
            <div className="flex items-center justify-between px-4 py-2 space-x-1 hover:bg-gray-200 transition duration-200">
                <div className="space-y-0.5">
                    <h6 className="text-sm font-bold">{article.title}</h6>
                    <p className="text-xs font-medium text-gray-500">{article.source.name}</p>
                </div>
                <img className="rounded-xl" width="70" src={article.urlToImage} alt="" />
            </div>
        </a>
    )
}

Widgets

Widgets.jsx


import { SearchIcon } from "@heroicons/react/outline";
import News from "./News";
+ import { useState } from "react";

+ export default function Widgets({ newsResults }) {
+ const [articleNum, setArticleNum] = useState(3);
  return (
    <div className="xl:w-[600px] hidden lg:inline ml-8 space-y-5">
      <div className="w-[90%] xl:w-[75%] sticky top-0 bg-white py-1.5 z-50">
        <div className="flex items-center p-3 rounded-full bg-red-300 relative">
          <SearchIcon className="h-5 z-50 text-gray-500" />
          <input
            className="absolute inset-0 rounded-full pl-11 border-gray-500 text-gray-700 focus:shadow-lg focus:bg-white bg-gray-100 "
            type="text"
            placeholder="Search Twitter"
          />
        </div>
      </div>

+      <div className="text-gray-700 space-y-3 bg-gray-100 rounded-xl pt-2 w-[90%] xl:w-[75%]">
+        <h4 className="font-bold text-xl px-4">What's happening</h4>
+        {newsResults.slice(0, articleNum).map((article) => (
+          <News key={article.title} article={article} />
+        ))}
+        <button onClick={()=>setArticleNum(articleNum + 3)}  className="text-blue-300 pl-4 pb-3 hover:text-blue-400">
+          Show more
+        </button>
+      </div>
    </div>
  );
}

page/index

index.jsx


import Head from 'next/head'
import Image from 'next/image'
import Sidebar from '../components/Sidebar';
import Feed from '../components/Feed';
import Widgets from '../components/Widgets';


- export default function Home() {
+ export default function Home({ newsResults }) {
  return (
    <div>
      <Head>
        <title>Twitter Clone</title>
        <meta name="description" content="Generated by create next app" />
        <link rel="icon" href="/favicon.ico" />
      </Head>
-      <main className="flex min-h-screen max-w-7xl mx-auto">
+      <main className="flex min-h-screen mx-auto">
        {/* Header */}

        {/* Sidebar */}
        <Sidebar />


        {/* Feed */}
        <Feed/>
        {/* Modal */}
-        <Widgets />
+        <Widgets newsResults={newsResults.articles} />
      </main>
    </div>
  )
}

+ export async function getServerSideProps() {
+  const newsResults = await fetch(
+    "https://saurav.tech/NewsAPI/top-headlines/category/business/us.json"
+  ).then((res) => res.json());
+  return {
+    props: {
+      newsResults,
+    },
+  };
}

参考

css

javascript

Next.js

SSR

React

firebase

その他

NewAPI top-headline

パラメーター

レスポンス（Postmanで確認）

Udemy

Create the news section of the widgets component

githubコミット分