Trouble replacing middle of content with JavaScript regex? -

i have text

name[one][1][two][45][text]

i catch text "45" using pattern

/(.*?)rows\]\[([0-9]*)(.*)/; 

but how can replace 45 other digit? because if use same pattern replace method, replacing entrire previous word. code is

var name = "name[one][1][two][45][text]"; var pattern = /(.*?)two\]\[([0-9]*)(.*)/; var number = name.match(pattern); number = parseint(number[2]);  var replacepattern = /(.*?)two\]\[([0-9]*)/; var newname = name.replace(replacepattern, parseint(number + 2)); console.log(newname); 

but it's returning 47][text]

but how can replace 45 other digit?

you can use replace function matching groups :

for example — here replace 45 7 :

   "name[one][1][two][45][text]".replace(/(.*?)(two\]\[)([0-9]*)(.*)/,function (a,b,c,d,e){         // replace 7 want         return b+c+'7'+e;     }) 

result :

"name[one][3][two][7][text]" 

notice i've added () include other parts can later , add together.

edit: regarding actual example (+=2) : you can this :

return b+c+(parseint(d)+2)+e; -- actual example