feat(api): typescript

api/services/slack.ts

@@ -0,0 +1,23 @@
+import { send, sendError, fetch, NowRequest, NowResponse } from '../util/http'
+
+export default async function handler(req: NowRequest, res: NowResponse) {
+  const { query } = req.query
+
+  if (!query) {
+    return sendError(res, new Error('no query given'))
+  }
+
+  try {
+    const response = await fetch(
+      `https://${encodeURIComponent(query)}.slack.com`
+    )
+    const availability = response.status !== 200
+    send(res, { availability })
+  } catch (err) {
+    if (err.code === 'ENOTFOUND') {
+      send(res, { availability: true })
+    } else {
+      sendError(res, err)
+    }
+  }
+}