Call Golang from JavaScript

Getting Help
1

Did someone know how i can call a Golang Methode (func stop(){) from JavaScript?

Thanks, Leon

2

Hey @Leon_Merten, you could always use ajax to call back to a server running Go.

Here’s an example:

(P.S. You don’t need to run the index.html file on the Go server for it to work like in this example, but I prefer to keep everything running together)

index.html:

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>Call Go</title>
		<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
		<script type="text/javascript">
			$(document).ready(function() {
				$("#callGo").on('click', function() {
					$.ajax({
						url: "http://localhost:9000/callme",
						method: "GET",
						success: function(data) {
							$("#response").html(data);
						},
					});
				});
			});
		</script>
	</head>
	<body>
		<button id="callGo" type="submit">Call Go Code</button>
		<div id="response"></div>
	</body>
</html>

main.go:

package main

import (
	"fmt"
	"html/template"
	"log"
	"net/http"
)

// Load the index.html template.
var tmpl = template.Must(template.New("tmpl").ParseFiles("index.html"))

func main() {
	// Serve / with the index.html file.
	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		if err := tmpl.ExecuteTemplate(w, "index.html", nil); err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
		}
	})

	// Serve /callme with a text response.
	http.HandleFunc("/callme", func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprintln(w, "You called me!")
	})

	// Start the server at http://localhost:9000
	log.Fatal(http.ListenAndServe(":9000", nil))
}
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