$ go get github.com/benibudiharto/go-etm
package main
import (
"github.com/benibudiharto/go-etm"
"fmt"
)
func main() {
params := map[string]string{"utm_campaign": "new-year-sale", "utm_source": "email"}
html := "<html>" +
"<head></head>" +
"<body>" +
"<a href='http://example.com' x-button='buy'>Buy</a>" +
"<br/>" +
"<div>" +
"<a href='http://example.com/register' x-button='register'>Register</a>" +
"</div>" +
"</body>" +
"</html>"
fmt.Println(etm.Convert(html, params))
}Result
<html>
<head></head>
<body>
<a href="http://example.com?utm_campaign=new-year-sale&utm_source=email&x-button=buy" x-button="buy">Buy</a>
<br/>
<div>
<a href="http://example.com/register?utm_campaign=new-year-sale&utm_source=email&x-button=register" x-button="register">Register</a>
</div>
</body>
</html>