What are Go template libraries and how do they work?

What are Go template libraries and how do they work?

Go template libraries are tools that allow you to generate text output based on templates. They are commonly used for rendering HTML, emails, or any text format by embedding dynamic data into static templates.

Can you give me an example of how to use a Go template?

Sure! Here's a simple example: you can create a template for an HTML page and use the text/template package to fill in dynamic data like this:

package main

import (
    "os"
    "text/template"
)

func main() {
    const tpl = `Hello, {{.Name}}!` 
    t := template.Must(template.New("greet").Parse(tpl))
    data := struct { Name string }{Name: "Alice"}
    t.Execute(os.Stdout, data)
}

This will output: Hello, Alice!.

What are some common use cases for Go templates?

Common use cases include generating HTML for web pages, creating configuration files, and producing emails or reports where dynamic content is needed.

Are there any popular libraries for working with Go templates?

Yes, some popular libraries include text/template and html/template, which are part of the Go standard library. Additionally, there are third-party libraries like pongo2 and jet that offer more features.