Platforms: Readd support for WebGL2

[leomeinel]

Purpose

This readds support for WebGL2 that has been removed in 124607d

Tested platforms

All examples have been tested and are working flawlessly on the following targets:

• x86_64-unknown-linux-gnu
• wasm32-unknown-unknown (See: Platforms: Readd support for WebGL2 #26 (comment))

Bevy 0.18

I also have https://github.com/leomeinel/bevy_lit/tree/bevy-0-18-webgl which includes changes from #23 but I wanted this to not depend on it.

[leomeinel]

The stress_test not working as far as I can tell is because of issues in FpsOverlayPlugin. These have been resolved here: bevyengine/bevy#21885

When using https://github.com/leomeinel/bevy_lit/tree/bevy-0-18-webgl which uses Bevy 0.18 it is working on WebGL2:

[malbernaz]

Hey, thanks for pulling this off. And sorry for not taking a look at it sooner (life 🤷‍♂️). I'll be reviewing this soon.

[leomeinel]

Hey, thanks for pulling this off. And sorry for not taking a look at it sooner (life 🤷‍♂️). I'll be reviewing this soon.

Perfect, I'll be fixing conflicts in a few days. I'm currently busy with something else. If you want to however you can also just do this on your own :)

I'm happy that you found the time to take a look at it. 👍

[leomeinel]

I'm currently testing the merge of main, but I'm pretty sure that it should work. I kind of forgot about this PR so I'm sorry that I didn't get to this sooner.

All examples are working and have been tested on

• x86_64-unknown-linux-gnu
• webgl2

Update

This is ready to be merged. All examples including stress_test work on webgl2 and x86_64-unknown-linux-gnu.

[malbernaz]

From a first glance this is looking good. Can you share your setup for testing the webgl2 target?

[leomeinel]

From a first glance this is looking good. Can you share your setup for testing the webgl2 target?

Repo changes

ℹ️ This is needed to run the examples because wasm needs a custom runner and because of wasm_js being required on wasm32-unknown-unknown

diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 0000000..bc39f05
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,2 @@
+[target.'cfg(all(target_family = "wasm", any(target_os = "unknown", target_os = "none")))']
+runner = "wasm-server-runner"
diff --git a/Cargo.toml b/Cargo.toml
index a5c09c2..352fc4f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,6 +27,9 @@ indexmap = "2"
 bevy = { version = "0.19.0", features = ["bevy_dev_tools"] }
 rand = { version = "0.10.1" }
 
+[target.'cfg(all(target_family = "wasm", any(target_os = "unknown", target_os = "none")))'.dev-dependencies]
+getrandom =  { version = "0.4", features = ["wasm_js"] }
+
 [profile.dev]
 opt-level = 1

Testing environment

• Browser: Ungoogled Chromium 150.0.7871.46
• rustc: rustc 1.96.0 (ac68faa20 2026-05-25)

One also has to install wasm-server-runner on the machine.

Running the example

To run any example one can now just do:

cargo run --target wasm32-unknown-unknown --example texture_light

This should create a local http server listening on http://127.0.0.1:1334/. The ip and port will also be printed after executing cargo run [...]