1 files changed, 39 insertions, 0 deletions
diff --git a/shared/utils/src/get-pwa-display-mode.ts b/shared/utils/src/get-pwa-display-mode.ts
new file mode 100644
index 0000000..506c80d
--- /dev/null
+++ b/shared/utils/src/get-pwa-display-mode.ts
@@ -0,0 +1,39 @@
+export enum PWADisplayMode {
+    TWA = 'twa',
+    BROWSER = 'browser',
+    STANDALONE = 'standalone',
+    MINIMAL = 'minimal-ui',
+    FULLSCREEN = 'fullscreen',
+    OVERLAY = 'window-controls-overlay',
+    UNKNOWN = 'unknown',
+}
+
+/**
+ * For PWA, reads the "display" value from the manifest.json and returns the proper value if it matches.
+ * Inspired by the sample snippet here: https://web.dev/learn/pwa/detection
+ */
+export const getPWADisplayMode = (): PWADisplayMode => {
+    switch (true) {
+        case document.referrer.startsWith('android-app://'):
+            return PWADisplayMode.TWA;
+
+        case window.matchMedia('(display-mode: browser)').matches:
+            return PWADisplayMode.BROWSER;
+
+        case window.matchMedia('(display-mode: standalone)').matches:
+            return PWADisplayMode.STANDALONE;
+
+        case window.matchMedia('(display-mode: minimal-ui)').matches:
+            return PWADisplayMode.MINIMAL;
+
+        case window.matchMedia('(display-mode: fullscreen)').matches:
+            return PWADisplayMode.FULLSCREEN;
+
+        case window.matchMedia('(display-mode: window-controls-overlay)')
+            .matches:
+            return PWADisplayMode.OVERLAY;
+
+        default:
+            return PWADisplayMode.UNKNOWN;
+    }
+};