go代码
package main
import (
"syscall/js"
)
func addxxxx(this js.Value, args []js.Value) interface{} {
if len(args) != 2 {
return "Invalid number of arguments. Expected 2."
}
num1 := args[0].Float()
num2 := args[1].Float()
result := num1 + num2
return result
}
func main() {
js.Global().Set("addxxxx", js.FuncOf(addxxxx))
done := make(chan struct{}, 0)
<-done
}
把编译后的wasm复制到静态文件目录/path/to/static，类似于js，css。。。
GOOS=js GOARCH=wasm go build -o go_main.wasm
将 Golang SDK 中的 wasm_exec.js 复制到工作目录 /path/to/static 改成你的路径
cp "$GOROOT/misc/wasm/wasm_exec.js" /path/to/static
前端html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Go WebAssembly Calculator</title>
<script src="./wasm_exec.js"></script> //加载刚才复制的js
<script>
// 在页面加载完毕后执行
window.onload = function() {
const go = new Go(); // wasm_exec.js 中的定义
WebAssembly.instantiateStreaming(fetch('./main2.wasm'), go.importObject)
.then(res => {
go.run(res.instance); // 执行 go main 方法
});
};
function calculate() {
const num1 = parseFloat(document.getElementById("num1").value);
const num2 = parseFloat(document.getElementById("num2").value);
console.log(window)
const result = window.addxxxx(num1, num2);
document.getElementById("result").innerHTML = result;
return new Promise(()=>{
})
}
</script>
</head>
<body>
<h1>Simple Calculator</h1>
<input type="number" id="num1" value="1" placeholder="Number 1"> <br>
<input type="number" id="num2" value="2" placeholder="Number 2"><br>
<button onclick="calculate()">Calculate</button>
<h2>Result: <span id="result"></span></h2>
</body>
</html>