When I'm calling a Go template function to output HTML, it displays ZgotmplZ
.
Sample code:
http://play.golang.org/p/tfuJa_pFkm
package main
import (
"html/template"
"os"
)
func main() {
funcMap := template.FuncMap{
"printSelected": func(s string) string {
if s == "test" {
return `selected="selected"`
}
return ""
},
"safe": func(s string) template.HTML {
return template.HTML(s)
},
}
template.Must(template.New("Template").Funcs(funcMap).Parse(`
<option {{ printSelected "test" }} {{ printSelected "test" | safe }} >test</option>
`)).Execute(os.Stdout, nil)
}
Output:
<option ZgotmplZ ZgotmplZ >test</option>
"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:
<img src="#ZgotmplZ">
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(`
<option {{ .attr |attr }} >test</option>
{{.html|safe}}
`)).Execute(os.Stdout, map[string]string{"attr":`selected="selected"`,"html":`<option selected="selected">option</option>`})
}
The output will look like:
<option selected="selected" >test</option>
<option selected="selected">option</option>
You may want to define some other functions which can convert string to template.CSS, template.JS, template.JSStr, template.URL etc.