Automatically inserts Turbo Stream responses.

This makes it easier for users so they don't have to insert the Turbo
Stream HTML into the body.

Author: excid3

README.md

@@ -35,6 +35,15 @@ async myMethod () {
 }
 ```
 
+#### Turbo Streams
+
+Request.js can automatically process Turbo Streams responses for you. Ensure that your web app sets the `window.Turbo` global variable:
+
+```javascript
+import { Turbo } from "@hotwired/turbo-rails"
+window.Turbo = Turbo
+```
+
 # License
 
 Rails Request.JS is released under the [MIT License](LICENSE).

src/request.js

@@ -13,6 +13,7 @@ export class Request {
     if (response.unauthenticated && response.authenticationURL) {
       return Promise.reject(window.location.href = response.authenticationURL)
     } else {
+      if (response.ok && response.isTurboStream) { response.renderTurboStream() }
       return response
     }
   }

src/response.js

@@ -47,4 +47,20 @@ export class Response {
   get text () {
     return this.response.text()
   }
+
+  get isTurboStream () {
+    return this.contentType.match(/^text\/vnd\.turbo-stream\.html/)
+  }
+
+  async renderTurboStream () {
+    if (this.isTurboStream) {
+      if (window.Turbo) {
+        Turbo.renderStreamMessage(await this.text)
+      } else {
+        console.warn('You must set `window.Turbo = Turbo` to automatically process Turbo Stream events with request.js')
+      }
+    } else {
+      return Promise.reject(new Error(`Expected a Turbo Stream response but got "${this.contentType}" instead`))
+    }
+  }
 }