Replacing hash with a string in the first n-characters of a url hash

Question

I have a $location.path() that is of the following type of format:

/request/add/c3smsVdMHpVvSrspy8Vwrr5Zh8qSyP7q

I am interested in filtering the hash after /request/add/ to the following. As you can see, the last four chars are shown, but everything else before that is labeled as [FILTERED]

/request/add/[FILTERED]yP7q

I did some basic code which converts the hidden chars to # , but I got stuck in trying to apply the string [FILTERED] after the /request/add .

old_path = $location.path()
path = old_path.replace(/.(?=.{4,}$)/g, '#');

Answer 1

You could use substring . This will give you the [FILTERED] contents then you can do whatever you'd like with them.

 var old_path = '/request/add/c3smsVdMHpVvSrspy8Vwrr5Zh8qSyP7q'; var filtered = old_path.substring('/request/add/'.length, old_path.length - 4); var path = old_path.replace(filtered, '[FILTERED]'); console.log(path);