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JavaScript 論理演算子の挙動

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論理演算子の挙動

論理演算子は、if文のように条件分岐に使うことができます。

&&

意味:LeftがtrueならばRightを返す。
例:

test.js
import React from "react";

export const App = () => {
  return (
    <>
      <div>
        {true && "Left is true"} 
      </div>
    </>
  );
};
//結果
Left is true

Left || Right

意味:LeftがfalseならばRightを返す。
例:

test.js
import React from "react";

export const App = () => {
  return (
    <>
      <div>
        {false || "Left is false"} 
      </div>
    </>
  );
};
//結果
Left is false

参考

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