> For the complete documentation index, see [llms.txt](https://easonwang.gitbook.io/web_advance/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://easonwang.gitbook.io/web_advance/slack-api.md).
# Slack API
## 讓 Bot 傳送訊息到 Private Channel
首先加入權限
之後 install 到 workplace 後會產生 OAuth token
之後要把 Bot 手動加入到 Private channel 中 (點選新增應用程式)
之後在 channel 資訊左下方找到 channel ID，並且紀錄下剛才的 Bot User OAuth Token
執行以下程式：
```javascript
const { WebClient } = require("@slack/web-api");
const options = {};
const web = new WebClient(
"Bot User OAuth Token",
options
);
const sendSlackMessage = async (message, channel = null) => {
const channelId = "Channel Id";
return new Promise(async (resolve, reject) => {
try {
const resp = await web.chat.postMessage({
text: message,
channel: channelId,
});
return resolve(true);
} catch (error) {
return resolve(true);
}
});
};
const sendMessage = async (message) => {
const resp = await sendSlackMessage(message);
console.log(resp); // true
};
sendMessage("Test App 123");
```