App
Menu
← Emotes

/happy

In the client, build 1.60.1.70630

Client ID
54
Slash commands
/happy, /glad, /yay
GlobalStrings tags
EMOTE55_CMD1, EMOTE55_CMD2, EMOTE55_CMD3

From the Forever client, build 1.60.1.70630: EmotesText, GlobalStrings, ChatEmoteConstants.lua, ChatFrameUtil.lua, ChatFrameEditBox.lua.