I use this regex
str = "asd34rgr888gfd98";
var p = str.match(/\d{2}/);
alert(p[0]);
butI not understood how can use variable as quantificator, that is how write this:
var number = 2;
var p = str.match(/\d{number}/);
P.S. I see this page JavaScript regex pattern concatenate with variable but not understood how use example from these posts, in my case.
You need to build your regex as a string and pass it to the RegExp constructor:
var regexString = '\\d{' + number + '}';
var regex = new RegExp(regexString);
var p = str.match(regex);
Notice that when building a regex via a string, you need to add some extra escape characters to escape the string as well as the regex.
var number = "2"
var p = new RegExp("\\d{" + number + "}");
This should work:
var str = "asd34rgr888gfd98";
number = 3;
p = str.match(new RegExp('\\d{' + number + '}'));
alert(p[0]);
