How to write a regex to match a Javascript object name?

Question

For example, consider Javascript object document.I wish to replace the string "document." with "doc." such that:

In a case such as xyz.document.abc "document." is not replaced.
When a variable is of form predocument.xyz "document." is not replaced.
When there is a case such as document.abc or (document.abc or =document.abc or +document.abc etc "document." is replaced.

Since Javascript does not support look behind regex please suggest an alternative

I need the cases when the word document be preceded by a "." character or a "\w" character to be excluded — Krishna Ravishankar
– Krishna Ravishankar, Commented Jun 22, 2017 at 16:03
([^\w.])document(?=[^\w]|\b) and replace with $1doc. Regex101 demo. — Przemek
– Przemek, Commented Jun 22, 2017 at 16:09

Przemek · Accepted Answer · 2017-06-23 16:01:57Z

1

Though originally posted as a comment, I'll allow myself to post my solution once again as an answer, because I don't want this question to hang somewhere as "open". Also, initially I thought that someone would come with a better solution in a second, but apparently it never happened, so there you go:

([^\w.])document(?=[^\w]|\b)

and replace with

$1doc

Regex101 demo.

answered Jun 23, 2017 at 16:01

Przemek

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