如何返回regex匹配子集(可能通过替换模式，但不替换)

Consider the following:
考虑以下:
var string = 'https://awesome-site.com/page/#s-in=ascending'
var regex  = /(s-in=)([\w.-]+)/g


var match  = string.match(regex)
console.log(match) 
// this returns: s-in=ascending

// Using replacement patterns, it's possibl to select 
// a subset of the string selected via the regex

var subset = ' 
 Consider the following: 
 考虑以下: 
 var string = 'https://awesome-site.com/page/#s-in=ascending'
var regex  = /(s-in=)([\w.-]+)/g


var match  = string.match(regex)
console.log(match) 
// this returns: s-in=ascending

// Using replacement patterns, it's possibl to select 
// a subset of the string selected via the regex

var subset = '$1' + 'new-string'
var match = string.replace(regex, subset)
cosnole.log(match)
// this returns: s-in=new-string
 
 I'm trying to figure out how to return the string after the equals sign via regex (ideally the one in the example above, because the original string, a URL, is potentially quite complex). 
 我正在尝试找出如何通过regex在等号后面返回字符串(理想情况下是上面示例中的字符串，因为原始的字符串URL可能非常复杂)。 
 Question: 
 问题: 
 How to return a subset of the regex-matched string, e.g.: the part after the =? 
  
  
 如何返回正则匹配字符串的子集，例如:=后面的部分? 
 3 个解决方案 
  
  #1 
   
   
   3   
   Use the exec method and get the captured groups like this: 
   使用exec方法，并得到这样的捕获组: 
    
    
     
     var re = /(s-in=)([\w.-]+)/g; 
var str = 'https://awesome-site.com/page/#s-in=ascending';

while ((m = re.exec(str)) !== null) {
    alert(m[2]);
} 
     
    
    
   Here, m[2] will hold the value ascending (the contents of the 2nd capturing group). 
   在这里，m[2]将保持值升序(第二个捕获组的内容)。 
   Note that if you are matching literal text, you do not have to capture it (here, s-in=). Adding unnecessary capture groups means unnecessary overhead. So, we'd better use /s-in=([\w.-]+)/g regex and refer to the text after = with m[1]. 
   请注意，如果您是匹配文字文本，则不需要捕获它(这里，s-in=)。添加不必要的捕获组意味着不必要的开销。因此，我们最好使用/s-in=([\w -]+)/g regex，并在= m[1]之后引用文本。 
   
  
  
  #2 
   
   
   0   
   If you use exec, it will return an array containing all the captured groups and the full match. 
   如果您使用exec，它将返回一个包含所有捕获组和完整匹配的数组。 
   var string = 'https://awesome-site.com/page/#s-in=ascending'
var regex  = /(s-in=)([\w.-]+)/g
regex.exec(string); //returns: ["s-in=ascending", "s-in=", "ascending"]
 
   
  
  
  #3 
   
   
   0   
    
    
     
     // below line will create the new object of  RegExp constructor.

var (variable name) = new RegExp('Your Regular expression'),
  
    // now create another variable to hold the substring that will match 
    // for that (created Object)'s method called ".exec()" use by passing "string you want to match" as a parameter.

    (sub string variable name) = (variable name).exec('string that you want to match'); 
     
    
    
   For Example  
   例如 
    
    
     
     var temp = new RegExp('/(s-in=)([\w.-]+)/g'),
        	    	substring = temp.exec('https://awesome-site.com/page/#s-in=ascending'); 
     
    
    
   
  

' + 'new-string'
var match = string.replace(regex, subset)
cosnole.log(match)
// this returns: s-in=new-string
var string =