I got following struct:

    type Data struct {
            Data1         int
            Data2       int
            ImpData     []struct {
                Title          string
                ID               string
                TextS string
            }
        }

I unmarshall the jsoncode into var o

        var o Data
        err = json.Unmarshal(output, &o)
        if err != nil {
            panic(err.Error())
        }

I get the data with a for loop (for testing output)

        for i := 0; i < len(o.ImpData); i++ {
                fmt.Printf(" Test: %+v", o.ImpData[i].Title)
                }

Till this point everything works, but i dont know how to excatly execute the Template with the right parameters and data.

    tmpl, _ := template.ParseFiles("index.html")
    tmpl.Execute(w, o)
    
    
HTML:
<p style="color: black;"> {{ range .o }}  {{ . }} {{end}}</p>

This doesnt work and i tried everyhting.