請問下為什么沒替換成功？打印信息為：name/${name}/ 'xiaoming'the age of ${name} is ${age}age/${age}/ 8the age of ${name} is ${age}const template = "the age of ${name} is ${age}";const data = { name: "xiaoming", age: 8};console.log(render(template, data));// 輸出: "the age of xiaoming is 8"function render(template,data) {  for (key in data) {    if(key) {      console.log(key);      var re = new RegExp("\$\{"+key+"\}");      console.log(re,data[key]);      var ans = template.replace(re,data[key]);      // console.log("test:",template.replace("${name}","xiaoming"));      console.log(ans);     }      }}