How to Include Local JavaScript Files in Go Templates?

Include JavaScript Files in Go Templates

You're encountering issues including a local JavaScript file in your Go template. Let's explore how to address this with ease:

Option 1: Manual File Handling

Write your own handler function to read the file content, set the appropriate content type, and send it as a response:

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; charset=utf-8")
    w.Write(data)
}

Option 2: Using http.ServeFile()

This function simplifies file serving by handling file reading and content type setting:

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

Option 3: Leveraging http.FileServer()

For serving multiple static files:

http.Handle("/tmpfiles/",
    http.StripPrefix("/tmpfiles/", http.FileServer(http.Dir("/tmp"))))

This registers a handler at /tmpfiles/ that serves files from your local /tmp directory.

For example, this script tag will load jquery.min.js from /tmp:

<script type="text/javascript" src="/tmpfiles/jquery.min.js">

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