Having trouble with Go Templates - wanting to display base/index.html layout across all pages

I've setup my handlers with little to no issue.

At the moment I've got an index.html page - which I've defined as "index", and I've got a login.html page - which is just a dummy form.

I essentially want to navigate to the /login url (already setup) and it display the index.html (base page) layout - with the form on the page.

I thought I could simply parse in {{template. index}} into my login.html file, but that doesn't seem to be working. I've spent the last two hours trying to resolve this - scratching my head but it's not clicking for me at the moment.

I've also added in the handlers.go file, just incase the global parsing is causing an issue.

index.html
~~~

{{ define "index" }}
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <link rel="stylesheet" type="text/css" href="/static/css/main.css" />
  <title>Document</title>
</head>
<body>
  <div class="wrapper">
    {{template "nav" .}}
    <div class="bodySection">

    </div>
  </div>
</body>
</html>
{{ end }}

{{ define "login" }}
<form action="login" method="post">
  <input type="hidden" name="goto" value="news">
  <table>
    <tbody>
      <tr>
        <td>username:</td>
        <td><input type="text" name="acct" size="20" autocorrect="off" spellcheck="false" autocapitalize="off" autofocus></td>
      </tr>
      <tr>
        <td>password:</td>
        <td><input type="password" name="pw" size="20"></td>
      </tr>
    </tbody>
  </table>
  <br>
  <input type="submit" value="login">
</form>
{{ end }}

handlers.go
~~~

package main

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

/* sort out 404
if r.ULR.Path =! "/"{
    http.NotFound(w, r)
    return
}
*/

// package level variable
var tmpl *template.Template

func templateParse() {
    var err error
    tmpl, err = template.ParseGlob("ui/html/*.html")
    if err != nil {
        log.Println("Error parsing templates:", err)
        // nmaybe make fatal error
        return

    }
    for _, t := range tmpl.Templates() {
        fmt.Println("Parsed template:", t.Name())
    }

}

func homeHandler(w http.ResponseWriter, r *http.Request) {
    err := tmpl.ExecuteTemplate(w, "index", nil)
    if err != nil {
        log.Println("Template execution error:", err)
    }

}

func loginHandler(w http.ResponseWriter, r *http.Request) {
    err := tmpl.ExecuteTemplate(w, "login", nil)
    if err != nil {
        log.Println("Template execution error:", err)
    }

}

Solution

Although it would be helpful if you add more data like what error you are facing and how it is not working, You can simply define a base template then extend it in two pages:

index.html

{{ define "login" }}
{{template "base" .}}
{{ end }}

{{ define "login" }}
{{template "base" .}}
{{ end }}

{{ define "content" }}
< -- login content -- > 
</form>
{{ end }}

but you should write and define base before hand. if there is other data that can help I would be happy to know.