Add nullish coalescing operator example, see phetsims/density-buoyanc…

…y-common#168
phetsims · Aug 16, 2024 · fa8a3b2 · fa8a3b2
1 parent b8ea209
commit fa8a3b2
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/js/wilder/model/WilderModel.ts b/js/wilder/model/WilderModel.ts
@@ -184,6 +184,15 @@ class WilderModel implements TModel {
     hardAssert( forest === 5 );
     hardAssert( leaf === 1024 );
 
+    // Nullish Coalescing Assignment (??=)
+    let helloWorld;
+    helloWorld ??= 'Hello, World!';
+    hardAssert( helloWorld === 'Hello, World!' );
+
+    helloWorld = 'Hi again!';
+    helloWorld ??= 'Hello, World!';
+    hardAssert( helloWorld === 'Hi again!' );
+    console.log( 'helloWorld: should be Hi again!', helloWorld );
 
     type SecretSelfOptions = {
       secret?: number;