chatwoot/app/javascript/shared/helpers
Sivin Varghese c1d167bd64
fix: prevent -- signature delimiter rendering as \ in bubble (#14134)
# Pull Request Template

## Description

Fixes
https://linear.app/chatwoot/issue/CW-6903/signature-delimiter-renders-as-h2-when-using-enter-line-before

**1**. Fixes an issue where the signature delimiter `--` gets parsed as
an H2 when using **Enter** (new paragraph) before or after it, causing
it to render as a bold `\` in the message bubble.

* Ensures `--` renders as plain text
* Aligns renderer with parser behavior (both disable `lheading`)
* Prevents stray `\` from appearing as heading text

**2**. Also fixes a related editor issue where toggling signature
**off** leaves behind a stray `\` or `-- \`.

* Strips blank paragraph markers (`\`) and dangling hard breaks
(`\<newline>`) from ProseMirror serializer
* Applied in both `appendSignature` and `removeSignature`
* Replaces `trimEnd()` with shared helpers (`trimTrailingBlanks` /
`stripTrailingBlankMarkers`)



## Type of change

- [x] Bug fix (non-breaking change which fixes an issue)

## How Has This Been Tested?

#### Screenshots

**Before**
<img width="194" height="204" alt="image"
src="https://github.com/user-attachments/assets/b286ab50-7f89-4910-a552-1568902b93b3"
/>

**After**
<img width="194" height="220" alt="image"
src="https://github.com/user-attachments/assets/658cd543-bce2-46e2-a319-35e5374f1aef"
/>

**Editor**

https://linear.app/chatwoot/issue/CW-6903/signature-delimiter-renders-as-in-h2-when-using-enter-line#comment-5814b882

### Steps

#### Editor

1. Enable agent signature
2. Add and remove new lines around the signature using Enter/shift enter
3. Toggle signature off
4. Notice stray `\` or `-- \` remains

#### Bubble

1. Enable agent signature
2. Send a message using Enter between lines
3. Verify `--` renders correctly (no H2, no bold `\`)

## Checklist:

- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

---------

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
2026-05-05 13:00:27 +05:30
..
markdownIt chore: Use markdown-it instead of marked (#6123) 2023-03-03 13:26:54 +05:30
specs fix: prevent -- signature delimiter rendering as \ in bubble (#14134) 2026-05-05 13:00:27 +05:30
vuex feat: Vite + vue 3 💚 (#10047) 2024-10-02 00:36:30 -07:00
AudioNotificationHelper.js feat: update tool-chain to latest (#7975) 2023-09-27 14:02:34 +05:30
BaseActionCableConnector.js perf: reduce presence update frequency and fix background tab throttling (#13726) 2026-03-09 18:23:44 +05:30
cache.js chore: Add cache to improve widget performance (#11163) 2025-03-24 16:04:49 -07:00
clipboard.js feat: Add the frontend support for MFA (#12372) 2025-09-18 21:16:06 +05:30
colorHelper.js feat: Update public portal colors with new design (#8230) 2023-11-23 08:16:52 +05:30
CustomErrors.js feat: Inline edit support for contact info (#13976) 2026-04-14 16:53:40 +04:00
CustomEventHelper.js feat: Add chatwoot:error sdk event (#3998) 2022-02-21 09:40:11 +05:30
DateHelper.js chore: Remove older UI (#11720) 2025-07-01 09:43:44 +05:30
documentHelper.js feat: add FE changes for captain pdf support for faq generation (#12115) 2025-09-02 19:01:16 +05:30
emoji.js chore: Check for empty strings in name formatter (#5434) 2022-09-14 07:15:04 -07:00
FileHelper.js fix: Prevent unsupported file types on clipboard paste (#13182) 2026-01-14 13:07:46 +04:00
HTMLSanitizer.js fix: Render links with target attribute (#4685) 2022-05-16 11:29:05 +05:30
IntegrationHelper.js feat: Upgrade Dyte apis to v2 (#10706) 2025-02-19 14:47:48 -08:00
KeyboardHelpers.js fix: prevent Ctrl+Enter adding extra line break on send (Windows) (#14077) 2026-04-20 18:16:41 +05:30
localStorage.js feat: Implement reply to for reply editor (#8063) 2023-10-10 19:13:12 +05:30
MessageFormatter.js fix: prevent -- signature delimiter rendering as \ in bubble (#14134) 2026-05-05 13:00:27 +05:30
MessageTypeHelper.js feat: TikTok channel (#12741) 2025-12-17 07:54:50 -08:00
mitt.js chore: Replace eventBus with mitt.js [CW-3275] (#9539) 2024-05-31 15:50:36 +05:30
platform.js fix: prevent Ctrl+Enter adding extra line break on send (Windows) (#14077) 2026-04-20 18:16:41 +05:30
portalHelper.js feat: Sync Popular Articles locale with widget locale (#11754) 2025-06-24 19:52:44 +05:30
ReportsDataHelper.js feat: add Conversation traffic heatmap (#6508) 2023-03-07 09:01:58 +05:30
sanitizeData.js feat: multiple UX improvements to labels (#7358) 2023-06-25 18:49:49 +05:30
sessionStorage.js feat: Prevent saving preferences and status when impersonating (#11164) 2025-05-20 17:34:30 -07:00
timeHelper.js feat(voice): Attach call recordings + show call duration on the bubble (#14344) 2026-05-04 17:14:01 +04:00
Validators.js fix: regex validation not applied for custom text attributes in UI (#14110) 2026-05-05 12:55:53 +05:30