diff --git a/.gitignore b/.gitignore
index 849ddff..69ae38e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
dist/
+assets/main.wasm
diff --git a/Makefile b/Makefile
index 5ae2bc1..f06086f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
build:
mkdir -p dist/
- GOOS=js GOARCH=wasm go build -o assets/json.wasm ./cmd/wasm
+ GOOS=js GOARCH=wasm go build -o assets/main.wasm ./cmd/wasm
go build -o dist/wasm-example-server .
diff --git a/assets/index.html b/assets/index.html
index 70357b3..7e43c18 100644
--- a/assets/index.html
+++ b/assets/index.html
@@ -4,7 +4,7 @@
diff --git a/assets/json.wasm b/assets/json.wasm
deleted file mode 100755
index 67710be..0000000
Binary files a/assets/json.wasm and /dev/null differ
diff --git a/assets/wasm_exec.js b/assets/wasm_exec.js
index 5651141..bc6f210 100644
--- a/assets/wasm_exec.js
+++ b/assets/wasm_exec.js
@@ -2,54 +2,25 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
+"use strict";
+
(() => {
- // Map multiple JavaScript environments to a single common API,
- // preferring web standards over Node.js API.
- //
- // Environments considered:
- // - Browsers
- // - Node.js
- // - Electron
- // - Parcel
- // - Webpack
-
- if (typeof global !== "undefined") {
- // global already exists
- } else if (typeof window !== "undefined") {
- window.global = window;
- } else if (typeof self !== "undefined") {
- self.global = self;
- } else {
- throw new Error("cannot export Go (neither global, window nor self is defined)");
- }
-
- if (!global.require && typeof require !== "undefined") {
- global.require = require;
- }
-
- if (!global.fs && global.require) {
- const fs = require("fs");
- if (typeof fs === "object" && fs !== null && Object.keys(fs).length !== 0) {
- global.fs = fs;
- }
- }
-
const enosys = () => {
const err = new Error("not implemented");
err.code = "ENOSYS";
return err;
};
- if (!global.fs) {
+ if (!globalThis.fs) {
let outputBuf = "";
- global.fs = {
+ globalThis.fs = {
constants: { O_WRONLY: -1, O_RDWR: -1, O_CREAT: -1, O_TRUNC: -1, O_APPEND: -1, O_EXCL: -1 }, // unused
writeSync(fd, buf) {
outputBuf += decoder.decode(buf);
const nl = outputBuf.lastIndexOf("\n");
if (nl != -1) {
- console.log(outputBuf.substr(0, nl));
- outputBuf = outputBuf.substr(nl + 1);
+ console.log(outputBuf.substring(0, nl));
+ outputBuf = outputBuf.substring(nl + 1);
}
return buf.length;
},
@@ -87,8 +58,8 @@
};
}
- if (!global.process) {
- global.process = {
+ if (!globalThis.process) {
+ globalThis.process = {
getuid() { return -1; },
getgid() { return -1; },
geteuid() { return -1; },
@@ -102,47 +73,26 @@
}
}
- if (!global.crypto && global.require) {
- const nodeCrypto = require("crypto");
- global.crypto = {
- getRandomValues(b) {
- nodeCrypto.randomFillSync(b);
- },
- };
- }
- if (!global.crypto) {
- throw new Error("global.crypto is not available, polyfill required (getRandomValues only)");
+ if (!globalThis.crypto) {
+ throw new Error("globalThis.crypto is not available, polyfill required (crypto.getRandomValues only)");
}
- if (!global.performance) {
- global.performance = {
- now() {
- const [sec, nsec] = process.hrtime();
- return sec * 1000 + nsec / 1000000;
- },
- };
+ if (!globalThis.performance) {
+ throw new Error("globalThis.performance is not available, polyfill required (performance.now only)");
}
- if (!global.TextEncoder && global.require) {
- global.TextEncoder = require("util").TextEncoder;
- }
- if (!global.TextEncoder) {
- throw new Error("global.TextEncoder is not available, polyfill required");
+ if (!globalThis.TextEncoder) {
+ throw new Error("globalThis.TextEncoder is not available, polyfill required");
}
- if (!global.TextDecoder && global.require) {
- global.TextDecoder = require("util").TextDecoder;
+ if (!globalThis.TextDecoder) {
+ throw new Error("globalThis.TextDecoder is not available, polyfill required");
}
- if (!global.TextDecoder) {
- throw new Error("global.TextDecoder is not available, polyfill required");
- }
-
- // End of polyfills for common API.
const encoder = new TextEncoder("utf-8");
const decoder = new TextDecoder("utf-8");
- global.Go = class {
+ globalThis.Go = class {
constructor() {
this.argv = ["js"];
this.env = {};
@@ -163,6 +113,10 @@
this.mem.setUint32(addr + 4, Math.floor(v / 4294967296), true);
}
+ const setInt32 = (addr, v) => {
+ this.mem.setUint32(addr + 0, v, true);
+ }
+
const getInt64 = (addr) => {
const low = this.mem.getUint32(addr + 0, true);
const high = this.mem.getInt32(addr + 4, true);
@@ -256,7 +210,10 @@
const timeOrigin = Date.now() - performance.now();
this.importObject = {
- go: {
+ _gotest: {
+ add: (a, b) => a + b,
+ },
+ gojs: {
// Go's SP does not change as long as no Go code is running. Some operations (e.g. calls, getters and setters)
// may synchronously trigger a Go event handler. This makes Go code get executed in the middle of the imported
// function. A goroutine can switch to a new stack if the current stack is too small (see morestack function).
@@ -319,7 +276,7 @@
this._resume();
}
},
- getInt64(sp + 8) + 1, // setTimeout has been seen to fire up to 1 millisecond early
+ getInt64(sp + 8),
));
this.mem.setInt32(sp + 16, id, true);
},
@@ -517,7 +474,7 @@
null,
true,
false,
- global,
+ globalThis,
this,
];
this._goRefCounts = new Array(this._values.length).fill(Infinity); // number of references that Go has to a JS value, indexed by reference id
@@ -526,7 +483,7 @@
[null, 2],
[true, 3],
[false, 4],
- [global, 5],
+ [globalThis, 5],
[this, 6],
]);
this._idPool = []; // unused ids that have been garbage collected
@@ -601,36 +558,4 @@
};
}
}
-
- if (
- typeof module !== "undefined" &&
- global.require &&
- global.require.main === module &&
- global.process &&
- global.process.versions &&
- !global.process.versions.electron
- ) {
- if (process.argv.length < 3) {
- console.error("usage: go_js_wasm_exec [wasm binary] [arguments]");
- process.exit(1);
- }
-
- const go = new Go();
- go.argv = process.argv.slice(2);
- go.env = Object.assign({ TMPDIR: require("os").tmpdir() }, process.env);
- go.exit = process.exit;
- WebAssembly.instantiate(fs.readFileSync(process.argv[2]), go.importObject).then((result) => {
- process.on("exit", (code) => { // Node.js exits if no event handler is pending
- if (code === 0 && !go.exited) {
- // deadlock, make Go print error and stack traces
- go._pendingEvent = { id: 0 };
- go._resume();
- }
- });
- return go.run(result.instance);
- }).catch((err) => {
- console.error(err);
- process.exit(1);
- });
- }
})();
diff --git a/go.mod b/go.mod
index 0e208a8..2e3232d 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
module wasm-canvas-example
-go 1.17
+go 1.21.3
require (
github.com/llgcode/draw2d v0.0.0-20210904075650-80aa0a2a901d
diff --git a/main.go b/main.go
index 2a5904f..33cb394 100644
--- a/main.go
+++ b/main.go
@@ -8,7 +8,7 @@ import (
)
var (
- //go:embed assets/index.html assets/json.wasm assets/wasm_exec.js
+ //go:embed assets/index.html assets/main.wasm assets/wasm_exec.js
assetsFolder embed.FS
)