How to delete substring beginning with "#blah" until end?

[pstein]

Assume I want to delete a substring which starts with "#blah" until the end of string. #blah itself should be deleted too.

How can I achieve this? e.g.

var address = document.URL.replace("#blah","");

deletes only the keyword but not the following, remaining part.

If "#blah" is not found in string then nothing should happen.

 

 

[Ingolme]

Find the position of the substring, then get everything up to that position.

let pos = document.URL.indexOf("#blah");
let address = document.URL;
if(pos >= 0) {
  address = address.substr(0, pos);
}