Use wgslLanguageFeatures to check for immediates support.

Author: greggman

webgpu/lessons/webgpu-immediates.md

@@ -12,9 +12,10 @@ them easiest to understand by reading them in order.
 Immediates are a new (2026) feature of WebGPU. They are supposed to be a **core** feature,
 meaning, they are suppose to be available everywhere, regardless of device.
 They will hopefully be shipping in all browsers by the end of 2026.
-You can check for support by checking for the existence of the function to set the,
+You can check if they are supported by checking if <code>wgslLanguageFeatures</code>
+has <code>'immediate_address_space'</code>.
 <pre class="prettyprint lang-javascript"><code>
-const canUseImmediates = !!GPURenderPassEncoder?.prototype.setImmediates;
+const canUseImmediates = navigator.gpu.wgslLanguageFeatures.has('immediate_address_space');
 </code></pre>
 Ideally, by 2027, you should no longer need this check.
 </div>

webgpu/webgpu-immediates-models.html

@@ -21,7 +21,6 @@
     <canvas></canvas>
   </body>
   <script type="module">
-/* global GPURenderPassEncoder */
 // see https://webgpufundamentals.org/webgpu/lessons/webgpu-utils.html#wgpu-matrix
 import {mat4} from '../3rdparty/wgpu-matrix.module.js';
 
@@ -34,8 +33,7 @@
   }
 
   // You can probably remove this check by 2027 🙏
-  const canUseImmediates = !!GPURenderPassEncoder?.prototype.setImmediates;
-  if (!canUseImmediates) {
+  if (!navigator.gpu.wgslLanguageFeatures.has('immediate_address_space')) {
     fail('need a browser that supports WebGPU immediates');
     return;
   }

webgpu/webgpu-immediates-triangles.html

@@ -21,7 +21,6 @@
     <canvas></canvas>
   </body>
   <script type="module">
-/* global GPURenderPassEncoder */
 async function main() {
   const adapter = await navigator.gpu?.requestAdapter();
   const device = await adapter?.requestDevice();
@@ -31,8 +30,7 @@
   }
 
   // You can probably remove this check by 2027 🙏
-  const canUseImmediates = !!GPURenderPassEncoder?.prototype.setImmediates;
-  if (!canUseImmediates) {
+  if (!navigator.gpu.wgslLanguageFeatures.has('immediate_address_space')) {
     fail('need a browser that supports WebGPU immediates');
     return;
   }