Where is the error in replace js?

@dvd already explained the reason .

  

Replace only accepts 2 parameters:

     

replace(string_buscada, nova_string);

My contribution is in the method of doing this, which would be using a callback instead of replace , like this:

var t = "(10px,10px)"
var change = [3,5];
var def = 10;
t = t.replace(/-|\d+/g,function(m){
  return change.length?change.shift():def;
});

console.log(t);

Explanation

The callback will change the catch found by the value passed in return , as I'm passing shift from var change will remove the first value from it and return to substitution and so on for each match found.

The var def is for case change is empty and has matchs to be replaced.

Obs

The regex for negative numbers is indeed wrong. I suggest using:

/[+-]?\d+/g

The replace only accepts 2 parameters:

replace(string_buscada, nova_string);

Soon your code will not work this way. One suggestion is to use match and make 2 replaces with the indexes of the regex result:

t = "(10px,10px)";
//    ↑↑   ↑↑
//   m[0] m[1]

m = t.match(/[-|\d]+/g);
t = t.replace(m[0],3).replace(m[1],5);
console.log(t);

Another example with different values:

t = "(4px,2px)";
m = t.match(/[-|\d]+/g);
t = t.replace(m[0],3).replace(m[1],5);
console.log(t);

Edit

As raised by the friend wmsouza , this regex is not correct. If one of the numbers were negative, it would replace only the negative sign, not the whole number.

The correct regex would be:

  

/[-|\d]+/g

Example:

t = "(4px,-2px)";
m = t.match(/[-|\d]+/g);
t = t.replace(m[0],3).replace(m[1],5);
console.log(t);

Replace has only 2 arguments.

The second argument of Replace is not an array array parameter. In Replace you should put an expression representing the replacement of all parts of the regular expression in the second argument. You set up the groups you want to capture in your regular expression and use the expression $n where n is the number of the captured group.

Example below:

var t = "(10px,10px)";
var n = ["3", "5"];
var r = t.replace(/(\()\d+(px,)\d+(px\))/g, "$1"+n[0]+"$2"+n[1]+"$3");

console.log(t);
console.log(r);