Quoted string in templates

I want to put in my html template (actually JavaScript part) null or string with email:

var email = null;
// or a string:
var email = "somebody@somewhere.com";

But with template

var email = {{.Email}};

I get quoted string everytime:

var email = "null";
var email = "somebody@somewhere.com";

How to fix it?

EDIT: here is my code: http://play.golang.org/p/8k4s8dv2PE

You can see Go surrounds string with quotes and removes comment - there is pre or post processing.

Without seeing your code, the best I can do is provide an example that shows your required functionality.

If I had to take a guess, I'd say the data you were passing in was a string, not a string pointer. A string cannot have a value of nil/null, only a string pointer can. Though that would yield a "", not a "null", (as demonstrated here), so I can only imagine that this is something weird you're doing in your code.

To prevent link-rot, I've duplicated the code examples below, though it's worth clicking through the links to see their output.

Required Functionality:

package main

import (
	"log"
	"os"
	"html/template"
)

type TemplateData struct {
	Email *string
}

func main() {

	const temp = "<script>var email = {{.Email}};</script>\n"

	t := template.Must(template.New("email_template").Parse(temp))
	email := "somebody@somewhere.com"
	err := t.Execute(os.Stdout, TemplateData{
		Email: &email,
	})
	if err != nil {
		log.Println("executing template:", err)
	}
	err = t.Execute(os.Stdout, TemplateData{
		Email: nil,
	})
	if err != nil {
		log.Println("executing template:", err)
	}

}

Trying to use a "null" string:

package main

import (
	"log"
	"os"
	"html/template"
)

type TemplateData struct {
	Email string
}

func main() {

	const temp = "<script>var email = {{.Email}};</script>\n"

	t := template.Must(template.New("email_template").Parse(temp))
	email := "somebody@somewhere.com"
	err := t.Execute(os.Stdout, TemplateData{
		Email: email,
	})
	if err != nil {
		log.Println("executing template:", err)
	}
	err = t.Execute(os.Stdout, TemplateData{
	})
	if err != nil {
		log.Println("executing template:", err)
	}

}

Using the least amount of editing to your code sample:

type TplCtx struct {
  UserEmail *string
}

and

t.Execute(os.Stdout, &TplCtx{nil})