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const str = "Hello, ${name}! You are ${age} years old.";
const regex = /\$\{(\w+)\}/g; // 匹配大括号内的单词字符
const matches = str.match(regex).map((item)=>item.slice(1,-2)); // 获取匹配结果数组
const params = []; // 用于存储参数和对应的值
matches
console.log(matches)