go template define to template code example

Example: go template

package main

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

type Person struct {
	Name string
	Age  int
}

func main() {

	os.Setenv("PORT", "3000")
	port := os.Getenv("PORT")
	html, _ := template.ParseFiles("index.html")

	http.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
		person := Person{Name: "john doe", Age: 23}
		fmt.Println(html.Execute(w, person))
	})

	http.ListenAndServe(":"+port, nil)
}