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Reactを基本からまとめてみた【5】【Props(プロップス)①】

Last updated at Posted at 2021-08-29

##Propsとは
親コンポーネントから子コンポーネントへ値を渡す為の仕組み。
『親』⇨『子』の1方向のみ。子コンポーネントでデータの書き換えは不可。

##Propsのメリット

  • コードの記述量が減る
  • 効率よくフロントエンド開発が行える
  • 『Component』+『Props』はUI開発において定番

##Button.jsの修正

Button.js
import React from "react";

const Button = (props) => {
  return (
    <button className="ui basic button">
      <i className="icon user" />
      {props.title}
    </button>
  );
};
export default Button;
App.js
import React from "react";
import Button from "./Button";

const App = () => {
  return (
    <div>
      <div>App</div>
      <Button title="post" />
      <Button title="edit" />
      <Button title="delete" />
      <Button title="submit" />
    </div>
  );
};
export default App;

##参考サイト
[【React入門】#5 Props(プロップス)の理解]
(https://www.youtube.com/watch?v=mT6EKxs-ACA)

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