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<!DOCTYPE html> <html> <body> <h1>JavaScript Set</h1> <p>entries() 从 Set 中返回带有 [value,value] 对的迭代器：</p> <p id="demo"></p> <script> // 创建 Set const letters = new Set(["a","b","c"]); // 列出所有条目 const iterator = letters.entries(); let text = ""; for (const entry of iterator) { text += entry + "<br>"; } document.getElementById("demo").innerHTML = text; </script> </body> </html>