<!DOCTYPE html> <html> <body> <h1>JavaScript Map 对象</h1> <p>能够使用对象作为键是 Map 的一个重要特性:</p> <p id="demo"></p> <script> // 创建对象 const apples = {name: 'Apples'}; const bananas = {name: 'Bananas'}; const oranges = {name: 'Oranges'}; // 创建 Map const fruits = new Map(); // 将对象添加到 Map fruits.set(apples, 500); fruits.set(bananas, 300); fruits.set(oranges, 200); document.getElementById("demo").innerHTML = fruits.get(apples); </script> </body> </html>