How Can I Include Local JavaScript Files in Go Web Templates?

Include Local JavaScript Files in Go Templates

In your Go code, you have defined a web page template that includes a JavaScript file:

var page = `...<script src="http://localhost:8081/jquery.min.js"></script>...`

However, you are having trouble loading the local jquery.min.js file. Here's how you can fix this:

Option 1: Manual File Reading and Serving

• Create a http.HandlerFunc to handle requests for the JavaScript file:

func SendJqueryJs(w http.ResponseWriter, r *http.Request) {
    data, err := ioutil.ReadFile("jquery.min.js")
    if err != nil {
        http.Error(w, "Couldn't read file", http.StatusInternalServerError)
        return
    }
    w.Header().Set("Content-Type", "application/javascript")
    w.Write(data)
}

• Register the handler and start the HTTP server:

http.HandleFunc("/jquery.min.js", SendJqueryJs) // Register the handler
http.ListenAndServe(":8081", nil)               // Start the server

Option 2: Using http.ServeFile

• Create a http.HandlerFunc that uses http.ServeFile to serve the JavaScript file:

func SendJqueryJs(w http.ResponseWriter, r *http.Request) {
    http.ServeFile(w, r, "jquery.min.js")
}

• Register the handler and start the HTTP server as shown in Option 1.

Option 3: Using http.FileServer

• Create a http.FileServer to serve static files from a directory:

staticServer := http.FileServer(http.Dir("./static"))

• Register the FileServer handler and start the HTTP server:

http.Handle("/static/", http.StripPrefix("/static/", staticServer))
http.ListenAndServe(":8081", nil)

In this case, you would place your jquery.min.js file in the static directory and access it through the URL /static/jquery.min.js.

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