如何获得开合括号对的弦

Question

我想在分割后找到带有字符串索引的左括号和右括号对，例如提供字符串

var str="class User{      constructor(name=null){ if(name !=null){ this.name=name; }else{  
this.name=`Created by Test`; } } sayHello(){     
 console.log(`Welcome to Testing`); } 
showName(){ console.log(`This is ${this.name} this side`); 
if(true){  }else{  } } } function testing(){};    
 class Details { constructor(name=null){ if(name !=null){ this.name=name; }else{ 
 this.name=`Created by Tester`; } }
 sayName(){ console.log(`Welcome to Test2`); } }"; 

str=str.split(' ').filter(n => n).join(' ');  //replaces extra spaces with none
var strArr= str.split(" "); //by using this array of string find index pair, 

我必须找到每个类的开头关闭对的数组，例如[{'class'：'User'，'index_pair'：[11，类括号的关闭索引]}，{'class'：'Details， 'index_pair'：[该类括号的开头索引，类括号的结尾索引]}]

谢谢！感谢您的帮助