A bug of glShaderSource in libwebgl.js?

[SetoKaiba]

Version of emscripten/emsdk:
The latest main branch

https://github.com/emscripten-core/emscripten/blob/main/src/lib/libwebgl.js#L3273-L3278
Check the code here.
According the comment, the 1st replacement should not overrides the 2nd & the 3rd replacement.
The layout rules should be kept.

Actually, the 1st replacement make the 2nd & the 3rd replacement useless.
This makes some custom development WebGL2 implementation render incorrectly on some devices.
For example, the Kwai Minigame renders incorrectly on Vivo S18.

source = "layout(binding = 1, std140)";
Actual Result: source = ""
Expected Result: source = "layout(std140)"

source = "layout(std140, binding = 1)" ;
Actual Result: source = ""
Expected Result: source = "layout(std140)"

[kainino0x]

cc @juj

[juj]

Thank you @SetoKaiba, very well caught.

Posted a PR to fix the issue at #25839 . Please let me know if that fix helps your scenario, or if there might still exist corner cases we might be missing.