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Add check for minimum browser version when running on Web

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This commit is contained in:
Wojciech Figat
2026-03-24 15:23:33 +01:00
parent df6b550c3d
commit cc89a1e1ca
3 changed files with 89 additions and 0 deletions
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Source/Tools/Flax.Build/Platforms/Web/WebToolchain.cs
+37
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@@ -341,6 +341,43 @@ namespace Flax.Build.Platforms
args.Add("-sSIDE_MODULE");
}
// Setup minimum browser versions
// https://webassembly.org/features/?categories=browsers#feature-note-3
uint minChrome = 0, minFirefox = 0, minSafari = 0;
bool addJSPI = false;
if (args.Any(arg => arg.Contains("-sJSPI") || arg.Contains("-sASYNCIFY=2")))
{
// JS Promise Integration
minChrome = 137; // May 2025
minFirefox = 147; // Jan 2026 (requires flag javascript.options.wasm_js_promise_integration in about:config)
minSafari = 260000; // Feb 2026 (Safari Technical Preview 238)
addJSPI = true; // Run check_jspi after check_browser_version
}
else
{
// Fixed-width SIMD, WebGPU support
minChrome = 91; // May 2021
minFirefox = 89; // Jun 2021
minSafari = 160400; // March 2023
}
args.Add("-sMIN_CHROME_VERSION=" + minChrome);
args.Add("-sMIN_FIREFOX_VERSION=" + minFirefox);
args.Add("-sMIN_SAFARI_VERSION=" + minSafari);
if (args.All(arg => !arg.Contains("-sASSERTIONS")))
{
// minimum_runtime_check.js from Emscripten checks min browser versions only with ASSERTIONS enabled so use custom check
var checkBrowserVersion = File.ReadAllText(Path.Combine(Globals.EngineRoot, "Source/Platforms/Web/Binaries/Data/check_browser_version.js"));
checkBrowserVersion = checkBrowserVersion.Replace("TARGET_NOT_SUPPORTED", "0x7fffffff");
checkBrowserVersion = checkBrowserVersion.Replace("MIN_CHROME_VERSION", minChrome.ToString());
checkBrowserVersion = checkBrowserVersion.Replace("MIN_FIREFOX_VERSION", minFirefox.ToString());
checkBrowserVersion = checkBrowserVersion.Replace("MIN_SAFARI_VERSION", minSafari.ToString());
var path = Utilities.NormalizePath(Path.Combine(options.IntermediateFolder, "check_browser_version.js"));
File.WriteAllText(path, checkBrowserVersion);
args.Add($"--pre-js \"{path}\"");
}
if (addJSPI)
args.Add($"--pre-js \"{Globals.EngineRoot}/Source/Platforms/Web/Binaries/Data/check_jspi.js\"");
// Customize output HTML shell
if (options.LinkEnv.Output == LinkerOutput.Executable)
args.Add($"--shell-file \"{Globals.EngineRoot}/Source/Platforms/Web/Binaries/Data/shell.html\"");