Add types for nodemailer-sendgrid (#44912)

types/nodemailer-sendgrid/index.d.ts

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+// Type definitions for nodemailer-sendgrid 1.0
+// Project: https://github.com/nodemailer/nodemailer-sendgrid
+// Definitions by: Luke Jones <https://github.com/luke-j>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 3.3
+
+import { Transport } from 'nodemailer';
+
+declare namespace nodemailerSendgrid {
+    interface SendgridOptions {
+        apiKey: string;
+    }
+}
+
+declare function nodemailerSendgrid(options: nodemailerSendgrid.SendgridOptions): Transport;
+
+export = nodemailerSendgrid;

types/nodemailer-sendgrid/nodemailer-sendgrid-tests.ts

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+import nodemailerSendgrid = require('nodemailer-sendgrid');
+import nodemailer = require('nodemailer');
+
+const opts: nodemailerSendgrid.SendgridOptions = { apiKey: 'XXXXXXXXXXXXXXXX' };
+const transport: nodemailer.Transporter = nodemailer.createTransport(nodemailerSendgrid(opts));
+const mailOptions: nodemailer.SendMailOptions = {
+    from: 'Foo Bar ✔ <foo@bar.com>',
+    to: 'foo@baz.com, foo@baz.com',
+    subject: 'Hello world ✔',
+    text: 'Hello world ✔',
+    html: '<b>Hello world ✔</b>',
+};
+
+transport.sendMail(mailOptions, (error: Error | null, info: nodemailer.SentMessageInfo): void => {
+    // nothing
+});

types/nodemailer-sendgrid/tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "nodemailer-sendgrid-tests.ts"
+    ]
+}

types/nodemailer-sendgrid/tslint.json

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+{ "extends": "dtslint/dt.json" }