regex - Pass a variable to a RegExp with symbol JavaScript -

i generate output mr. x born on 01-01-2000 using following code

var str="%(name)s born on %(date)s", replace={name:'mr.x',date:'01-01-2000'}, subject=["name","date"];  subject.map(function(data){    var regex = new regexp("%("+data+")s", 'g');    str=str.replace(regex,replace[data]) })  console.log(str); 

i cant able replace dynamic variable symbol 1 me find better solution thanks.

just escape ( , ) has special meaning in regex, used grouping (matches).

var regex = new regexp("%\\("+data+"\\)s", 'g'); 

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running code:

   var str="%(name)s born on %(date)s",      replace={name:'mr.x',date:'01-01-2000'},      subject=["name","date"];        subject.map(function(data){         var regex = new regexp("%\\("+data+"\\)s", 'g');         str=str.replace(regex,replace[data])      })        document.write(str);