regex - detect and replace more then two digits in string

Question

As soon as there are more then two digits in a string, I want to replace only them the digits. Example:

allowed:

bla 22 bla bla

should be replaced:

bla 234 bla 8493020348 bla

to

bla *** bla ********** bla

The exact numbers don't matter - just 1-2 digits should be displayed and if there are more then 2, then they should be replaced.

This is what I've already tried, but it always replaces the whole string and not only the digits....further if 2 digits are accepted and later on there's a third digit it gets triggered as well..

  var regex = /^(?:\D*\d){3}/g;
  str = str.replace(regex, "**");

So this won't work:

bla 12 and so on 123

It will become:

**

But I want it to be like this:

bla 12 and so on ***

Thank you SO much in advance!!

Robby Cornelissen · Accepted Answer · 2018-10-19 02:19:02Z

3

One solution is to pass a callback function to String.prototype.replace() and use String.prototype.repeat() to put in the correct number of asterisks:

string = string.replace(/\d{3,}/g, (v) => '*'.repeat(v.length));

Complete snippet:

const string =  'bla 22 bla 234 bla 8493020348 bla';

const result = string.replace(/\d{3,}/g, (v) => '*'.repeat(v.length));

console.log(result); // "bla 22 bla *** bla ********** bla"

edited Oct 19, 2018 at 2:19

answered Oct 19, 2018 at 1:18

Robby Cornelissen

98.6k23 gold badges154 silver badges180 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

christian Over a year ago

Totally awesome, this is exactly what I needed! Thank you so much! I will accept the answer as soon as possible! :-)

Collectives™ on Stack Overflow

regex - detect and replace more then two digits in string

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related