features.json

{
	"features": {
		"bigInt": {
			"description": "JS BigInt to Wasm i64 integration",
			"url": "https://github.com/WebAssembly/JS-BigInt-integration",
			"phase": 4
		},
		"bulkMemory": {
			"description": "Bulk memory operations",
			"url": "https://github.com/WebAssembly/bulk-memory-operations/blob/master/proposals/bulk-memory-operations/Overview.md",
			"phase": 4
		},
		"exceptions": {
			"description": "Exception handling",
			"url": "https://github.com/WebAssembly/exception-handling/blob/master/proposals/exception-handling/Exceptions.md",
			"phase": 2
		},
		"moduleLinking": {
			"description": "Module Linking",
			"url": "https://github.com/WebAssembly/module-linking/blob/master/proposals/module-linking/Explainer.md",
			"phase": 1
		},
		"multiValue": {
			"description": "Multi-value",
			"url": "https://github.com/WebAssembly/spec/blob/master/proposals/multi-value/Overview.md",
			"phase": 4
		},
		"mutableGlobals": {
			"description": "Import & export of mutable globals",
			"url": "https://github.com/WebAssembly/mutable-global/blob/master/proposals/mutable-global/Overview.md",
			"phase": 4
		},
		"referenceTypes": {
			"description": "Reference types",
			"url": "https://github.com/WebAssembly/reference-types/blob/master/proposals/reference-types/Overview.md",
			"phase": 4
		},
		"saturatedFloatToInt": {
			"description": "Non-trapping float-to-int conversions",
			"url": "https://github.com/WebAssembly/spec/blob/master/proposals/nontrapping-float-to-int-conversion/Overview.md",
			"phase": 4
		},
		"signExtensions": {
			"description": "Sign-extension operations",
			"url": "https://github.com/WebAssembly/spec/blob/master/proposals/sign-extension-ops/Overview.md",
			"phase": 4
		},
		"simd": {
			"description": "Fixed-width SIMD",
			"url": "https://github.com/WebAssembly/simd/blob/master/proposals/simd/SIMD.md",
			"phase": 4
		},
		"tailCall": {
			"description": "Tail calls",
			"url": "https://github.com/WebAssembly/tail-call/blob/master/proposals/tail-call/Overview.md",
			"phase": 3
		},
		"threads": {
			"description": "Threads and atomics",
			"url": "https://github.com/WebAssembly/threads/blob/master/proposals/threads/Overview.md",
			"phase": 2
		}
	},
	"browsers": {
		"Chrome": {
			"url": "https://www.google.com/chrome/",
			"logo": "/images/chrome.svg",
			"version": "90",
			"features": {
				"bigInt": true,
				"bulkMemory": true,
				"exceptions": "#enable-experimental-webassembly-features or WebAssembly Exception Handling Origin Trial",
				"multiValue": true,
				"mutableGlobals": true,
				"referenceTypes": "#enable-experimental-webassembly-features",
				"saturatedFloatToInt": true,
				"signExtensions": true,
				"simd": "#enable-webassembly-simd or WebAssembly SIMD Origin Trial",
				"tailCall": "#enable-experimental-webassembly-features",
				"threads": true
			}
		},
		"Firefox": {
			"url": "https://www.mozilla.org/firefox/",
			"logo": "/images/firefox.svg",
			"version": "79",
			"features": {
				"bigInt": true,
				"bulkMemory": true,
				"multiValue": true,
				"mutableGlobals": true,
				"referenceTypes": true,
				"saturatedFloatToInt": true,
				"signExtensions": true,
				"simd": "about:config -> javascript.options.wasm_simd, x86 and x86-64 only",
				"threads": true
			}
		},
		"Safari": {
			"url": "https://www.apple.com/safari/",
			"logo": "/images/safari_48x48.png",
			"version": "14.1",
			"features": {
				"bigInt": true,
				"bulkMemory": "JSC_useWebAssemblyReferences, enabled in Safari Technology Preview",
				"multiValue": true,
				"mutableGlobals": true,
				"referenceTypes": "JSC_useWebAssemblyReferences, enabled in Safari Technology Preview",
				"saturatedFloatToInt": "Enabled in Safari Technology Preview",
				"signExtensions": true,
				"threads": "JSC_useWebAssemblyThreading"
			}
		},
		"Wasmtime": {
			"url": "https://wasmtime.dev/",
			"logo": "/images/bca.png",
			"version": "0.22",
			"features": {
				"bigInt": null,
				"bulkMemory": true,
				"moduleLinking": "--enable-module-linking",
				"multiValue": true,
				"mutableGlobals": true,
				"referenceTypes": true,
				"saturatedFloatToInt": true,
				"signExtensions": true,
				"simd": "--enable-simd"
			}
		},
		"Wasmer": {
			"url": "https://wasmer.io/",
			"logo": "/images/wasmer.png",
			"version": "1.0",
			"features": {
				"bigInt": null,
				"bulkMemory": true,
				"multiValue": true,
				"mutableGlobals": true,
				"saturatedFloatToInt": true,
				"signExtensions": true,
				"simd": "--enable-simd",
				"threads": "--enable-threads"
			}
		},
		"Node.js": {
			"url": "https://nodejs.org/",
			"logo": "/images/nodejs.svg",
			"version": "15.0",
			"features": {
				"bigInt": true,
				"bulkMemory": true,
				"multiValue": true,
				"mutableGlobals": true,
				"referenceTypes": "--experimental-wasm-anyref",
				"saturatedFloatToInt": true,
				"signExtensions": true,
				"simd": "--experimental-wasm-simd",
				"threads": "--experimental-wasm-threads"
			}
		}
	}
}