▶︎

<h2 style="text-align:center;">document.write</h2>
<script>
document.write('① エスケープ (\') を使用');
document.write(" ");
document.write('I don\'t know, you don\'t know.');
document.write(" ");

document.write('② ダブル・クォーテーション内でエスケープ (\') を使用');
document.write(" ");
document.write("I don\'t know, you don\'t know.");
document.write(" ");

document.write('③ ダブル・クォーテーション (" ") を使用 (エスケープ不要)');
document.write(" ");
document.write("I don't know, you don't know.");
document.write(" ");

document.write('④ テンプレート・リテラル (バック・クォート) を使用');
document.write(" ");
document.write(`I don't know, you don't know.`);
document.write(" ");

document.write('⑤ + を使って \' を結合');
document.write(" ");
document.write("I don" + "'" + "t know, you don" + "'" + "t know.");
document.write(" ");

document.write('⑥ HTMLエンティティ (&amp;apos;) を使用');
document.write(" ");
document.write("I don&apos;t know, you don&apos;t know.");
</script>

</html>