WordPress has had emoji support since 4.2. 🚀💃😻
Instead of using the emoji codes Slack and a number of services use e.g. :thumbsup: it depends on the os/platform you are using (see https://codex.wordpress.org/Emoji.
When editing a post on Mac you can bring up the Emoji & Symbols keyboard by:
- Clicking the Edit menu
- Selecting “Emoji & Symbols”
Or you can use the keyboard shortcut ⌃⌘Space (Control – Command – Space)
Prospress ❤️ emoji.