Why am I seeing ZgotmplZ in my Go HTML template output?

Question

When I\'m calling a Go template function to output HTML, it displays ZgotmplZ.

Sample code:

http://play.golang.org/p/tfuJa_pFkm

Answer 1

"ZgotmplZ" is a special value that indicates that unsafe content reached a CSS or URL context at runtime. The output of the example will be:

You can add a safe and attr function to the template funcMap:

package main

import (
    "html/template"
    "os"
)

func main() {
    funcMap := template.FuncMap{
        "attr":func(s string) template.HTMLAttr{
            return template.HTMLAttr(s)
        },
        "safe": func(s string) template.HTML {
            return template.HTML(s)
         },
    }

    template.Must(template.New("Template").Funcs(funcMap).Parse(`
    test
        {{.html|safe}}
     `)).Execute(os.Stdout,   map[string]string{"attr":`selected="selected"`,"html":`option`})
}

The output will look like:

test
option

You may want to define some other functions which can convert string to template.CSS, template.JS, template.JSStr, template.URL etc.