feature: href for logo (with optional target="_blank")

README.md

@@ -244,7 +244,11 @@ It's possible to override the logo displayed in the top bar by specifying:
 await fastify.register(require('@fastify/swagger-ui'), {
   logo: {
     type: 'image/png',
-    content: Buffer.from('iVBOR...', 'base64')
+    content: Buffer.from('iVBOR...', 'base64'),
+    href: {
+      url: '/documentation',
+      target_blank: true,
+    }
   },
   theme: {
     favicon: [

lib/swagger-initializer.js

@@ -5,6 +5,7 @@ const serialize = require('./serialize')
 function swaggerInitializer (opts) {
   const logoBase64 = Buffer.from(opts.logo.content).toString('base64')
   const logoData = `data:${opts.logo.type};base64,${logoBase64}`
+  const logoHref = opts.logo.href
 
   return `window.onload = function () {
     function waitForElement(selector) {
@@ -62,6 +63,8 @@ function swaggerInitializer (opts) {
         const img = document.createElement('img')
         img.height = 40
         img.src = logoData
+        img.href = logoHref || resolveUrl('/')
+        logoTarget && (img.target = logoTarget)
         link.innerHTML = ''
         link.appendChild(img)
       })

types/index.d.ts

@@ -78,6 +78,8 @@ declare namespace fastifySwaggerUi {
   type FastifySwaggerUILogo = {
     type: string;
     content: string | Buffer;
+    href?: string;
+    target?: '_blank' | '_parent' | '_self' | '_top';
   }
 
   type SupportedHTTPMethods = "get" | "put" | "post" | "delete" | "options" | "head" | "patch" | "trace";