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Cross-Platform Emoji Support

The Chat SDK provides a unified emoji system that works seamlessly across platforms. Emoji are automatically converted between platform-specific formats:
  • Slack: :emoji_name: format (e.g., :thumbs_up:)
  • Google Chat: Unicode emoji (e.g., 👍)
  • Discord: Unicode emoji
  • Microsoft Teams: Unicode emoji

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Using Emoji in Messages

Simple template string interpolation: 
import { emoji } from "chat";

await thread.post(`Great job! ${emoji.thumbs_up} ${emoji.fire}`);
// Slack: "Great job! :+1: :fire:"
// GChat: "Great job! 👍 🔥"

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Emoji Object

The emoji object provides type-safe access to 100+ well-known emoji: 
import { emoji } from "chat";

// Reactions & Gestures
emoji.thumbs_up
emoji.thumbs_down
emoji.clap
emoji.wave
emoji.pray

// Emotions & Faces
emoji.heart
emoji.smile
emoji.laugh
emoji.thinking
emoji.cry

// Status & Symbols
emoji.check
emoji.x
emoji.warning
emoji.fire
emoji.star

// Objects & Tools
emoji.rocket
emoji.party
emoji.lightbulb
emoji.bug
emoji.lock

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EmojiValue Type

Each emoji is an immutable EmojiValue object: 
interface EmojiValue {
  readonly name: string;     // Normalized name (e.g., "thumbs_up")
  toString(): string;        // Returns "{{emoji:thumbs_up}}"
  toJSON(): string;          // Returns "{{emoji:thumbs_up}}"
}
Key features:
  • Object identity: Same emoji name always returns the same object instance
  • String conversion: Works in template literals via toString()
  • Singleton pattern: Enables === comparison
const e1 = emoji.thumbs_up;
const e2 = emoji.thumbs_up;
console.log(e1 === e2); // true - same object!

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Custom Emoji

Define your own emoji mappings: 
import { createEmoji, type EmojiFormats } from "chat";

// First, extend the type (in a .d.ts file)
declare module "chat" {
  interface CustomEmojiMap {
    unicorn: EmojiFormats;
    company_logo: EmojiFormats;
  }
}

// Then create your emoji helper
const myEmoji = createEmoji({
  unicorn: { slack: "unicorn_face", gchat: "🦄" },
  company_logo: { slack: "company", gchat: "🏢" },
});

await thread.post(`${myEmoji.unicorn} Magic!`);
// Slack: ":unicorn_face: Magic!"
// GChat: "🦄 Magic!"

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Emoji in Reactions

Use emoji for message reactions: 
const message = await thread.post("Deploy completed!");

// Add reaction
await message.addReaction(emoji.thumbs_up);

// Remove reaction
await message.removeReaction(emoji.thumbs_up);

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Reaction Event Handling

Listen for specific emoji reactions: 
import { emoji } from "chat";

chat.onReaction([emoji.thumbs_up, emoji.heart], async (event) => {
  if (event.added) {
    console.log(`${event.user.userName} reacted with ${event.emoji.name}`);
  }
  
  // Object identity comparison works!
  if (event.emoji === emoji.thumbs_up) {
    await event.thread.post("Thanks for the approval!");
  }
});

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EmojiResolver

Low-level API for platform conversion: 
import { defaultEmojiResolver } from "chat";

// Convert from Slack format
const e1 = defaultEmojiResolver.fromSlack("+1");
console.log(e1.name); // "thumbs_up"

// Convert from GChat format
const e2 = defaultEmojiResolver.fromGChat("👍");
console.log(e2.name); // "thumbs_up"

// Convert to platform format
const slackFormat = defaultEmojiResolver.toSlack(emoji.thumbs_up);
console.log(slackFormat); // "+1"

const gchatFormat = defaultEmojiResolver.toGChat(emoji.thumbs_up);
console.log(gchatFormat); // "👍"

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Well-Known Emoji

Complete list organized by category:

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Reactions & Gestures

emoji.thumbs_up      // 👍
emoji.thumbs_down    // 👎
emoji.clap           // 👏
emoji.wave           // 👋
emoji.pray           // 🙏
emoji.muscle         // 💪
emoji.ok_hand        // 👌
emoji.raised_hands   // 🙌
emoji.shrug          // 🤷
emoji.facepalm       // 🤦

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Emotions & Faces

emoji.heart          // ❤️
emoji.smile          // 😊
emoji.laugh          // 😂
emoji.thinking       // 🤔
emoji.sad            // 😢
emoji.cry            // 😭
emoji.angry          // 😠
emoji.love_eyes      // 😍
emoji.cool           // 😎
emoji.wink           // 😉
emoji.mind_blown     // 🤯

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Status & Symbols

emoji.check          // ✅
emoji.x              // ❌
emoji.warning        // ⚠️
emoji.info           // ℹ️
emoji.question       // ❓
emoji.exclamation    // ❗
emoji.fire           // 🔥
emoji.star           // ⭐
emoji.sparkles       // ✨
emoji.lightning      // ⚡
emoji.eyes           // 👀

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Status Indicators (Colored Circles)

emoji.green_circle   // 🟢
emoji.yellow_circle  // 🟡
emoji.red_circle     // 🔴
emoji.blue_circle    // 🔵

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Objects & Tools

emoji.rocket         // 🚀
emoji.party          // 🎉
emoji.trophy         // 🏆
emoji.lightbulb      // 💡
emoji.bug            // 🐛
emoji.lock           // 🔒
emoji.key            // 🔑
emoji.memo           // 📝
emoji.calendar       // 📅
emoji.bell           // 🔔
emoji.package        // 📦

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Arrows & Directions

emoji.arrow_up       // ⬆️
emoji.arrow_down     // ⬇️
emoji.arrow_left     // ⬅️
emoji.arrow_right    // ➡️
emoji.refresh        // 🔄

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Emoji in Cards

Emoji work in card text elements: 
import { Card, Text, emoji } from "chat";

await thread.post(
  <Card title={`Status Update ${emoji.rocket}`}>
    <Text>{emoji.check} Deployment successful</Text>
    <Text>{emoji.green_circle} All systems operational</Text>
  </Card>
);

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Placeholder Format

Internally, emoji use the placeholder format {{emoji:name}} which gets converted to platform-specific format when posting: 
import { convertEmojiPlaceholders } from "chat";

const text = "Thanks! {{emoji:thumbs_up}}";

convertEmojiPlaceholders(text, "slack");
// "Thanks! :+1:"

convertEmojiPlaceholders(text, "gchat");
// "Thanks! 👍"

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Matching Emoji

Check if a raw emoji matches a normalized emoji: 
import { defaultEmojiResolver } from "chat";

// Match Slack format
defaultEmojiResolver.matches("+1", emoji.thumbs_up); // true
defaultEmojiResolver.matches("thumbsup", emoji.thumbs_up); // true

// Match GChat format
defaultEmojiResolver.matches("👍", emoji.thumbs_up); // true

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Complete Example

Approval workflow with emoji reactions: 
import { Chat, emoji, Card, Text, Actions, Button } from "chat";

const chat = new Chat({ /* ... */ });

// Post approval request
chat.onNewMention(async (thread, message) => {
  const msg = await thread.post(
    <Card title={`${emoji.bell} Approval Required`}>
      <Text>Please review the deployment request</Text>
      <Actions>
        <Button id="approve" style="primary">
          {emoji.check} Approve
        </Button>
        <Button id="reject" style="danger">
          {emoji.x} Reject
        </Button>
      </Actions>
    </Card>
  );
  
  // Add initial reaction
  await msg.addReaction(emoji.eyes);
});

// Handle reactions
chat.onReaction([emoji.thumbs_up, emoji.thumbs_down], async (event) => {
  if (!event.added) return;
  
  if (event.emoji === emoji.thumbs_up) {
    await event.thread.post(
      `${emoji.check} Approved by ${event.user.userName}`
    );
  } else {
    await event.thread.post(
      `${emoji.x} Rejected by ${event.user.userName}`
    );
  }
});

// Handle button clicks
chat.onAction("approve", async (event) => {
  await event.thread.post(
    `${emoji.party} Deployment approved! ${emoji.rocket}`
  );
});

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Next Steps

Cards

Use emoji in card components

Actions

Add emoji to button labels