In Vim editor mode backreference can't work fine

[is3ka1]

Is this a hackmd.io issue?

• [x] Yes, the bug happens on https://hackmd.io
• [ ] No. If it's a self-hosted CodiMD instance, please fire up the issue in the repo of CodiMD: https://github.com/hackmdio/codimd

Read our Official tutorial

It's on https://hackmd.io/c/tutorials/

或是中文版 https://hackmd.io/c/tutorials-tw/

What's the problem

When I try to use backreference to replace things, I find it can't match the Regular Expression the Vim way.

maybe something like this:

:%s/\(\)/\1/

Current behaviour

Screenshot (optional) Note Link

Expected behaviour

After Press y / Y:

Environment

I use HackMD on:

Desktop

• OS: Ubuntu 18.04
• Browser: Firefox
• Browser Version: Mobile

Additional context

(ゞω< )

[ebardie]

The regex dialect isn't the same as the one used by Vim :(

The following works to change all words ending in 'ing' to end in 'ed'.

:%s/([a-zA-Z]+)ing/$1ed/g