GoHTML - HTML formatter for Go

GoHTML is an HTML formatter for Go. You can format HTML source codes by using this package.

Install

go get -u github.com/yosssi/gohtml

Example

Example Go source code:

package main

import (
	"fmt"

	"github.com/yosssi/gohtml"
)

func main() {
	h := `<!DOCTYPE html><html><head><title>This is a title.</title><script type="text/javascript">
alert('aaa');
if (0 < 1) {
	alert('bbb');
}
</script><style type="text/css">
body {font-size: 14px;}
h1 {
	font-size: 16px;
	font-weight: bold;
}
</style></head><body><form><input type="name"><p>AAA<br>BBB></p></form><!-- This is a comment. --></body></html>`
	fmt.Println(gohtml.Format(h))
}

Output:

<!DOCTYPE html>
<html>
  <head>
    <title>
      This is a title.
    </title>
    <script type="text/javascript">
      alert('aaa');
      if (0 < 1) {
      	alert('bbb');
      }
    </script>
    <style type="text/css">
      body {font-size: 14px;}
      h1 {
      	font-size: 16px;
      	font-weight: bold;
      }
    </style>
  </head>
  <body>
    <form>
      <input type="name">
      <p>
        AAA
        <br>
        BBB>
      </p>
    </form>
    <!-- This is a comment. -->
  </body>
</html>

Output Formatted HTML with Line No

You can output formatted HTML source codes with line no by calling FormatWithLineNo:

package main

import (
	"fmt"

	"github.com/yosssi/gohtml"
)

func main() {
	h := `<!DOCTYPE html><html><head><title>This is a title.</title><script type="text/javascript">
alert('aaa');
if (0 < 1) {
	alert('bbb');
}
</script><style type="text/css">
body {font-size: 14px;}
h1 {
	font-size: 16px;
	font-weight: bold;
}
</style></head><body><form><input type="name"><p>AAA<br>BBB></p></form><!-- This is a comment. --></body></html>`
	fmt.Println(gohtml.FormatWithLineNo(h))
}

Output:

 1  <!DOCTYPE html>
 2  <html>
 3    <head>
 4      <title>
 5        This is a title.
 6      </title>
 7      <script type="text/javascript">
 8        alert('aaa');
 9        if (0 < 1) {
10        	alert('bbb');
11        }
12      </script>
13      <style type="text/css">
14        body {font-size: 14px;}
15        h1 {
16        	font-size: 16px;
17        	font-weight: bold;
18        }
19      </style>
20    </head>
21    <body>
22      <form>
23        <input type="name">
24        <p>
25          AAA
26          <br>
27          BBB>
28        </p>
29      </form>
30      <!-- This is a comment. -->
31    </body>
32  </html>

Format Go html/template Package's Template's Execute Result

You can format Go html/template package's template's execute result by passing Writer to the tpl.Execute:

package main

import (
	"os"
	"text/template"

	"github.com/yosssi/gohtml"
)

func main() {

	tpl, err := template.New("test").Parse("<html><head></head><body>{{.Msg}}</body></html>")

	if err != nil {
		panic(err)
	}

	data := map[string]interface{}{"Msg": "Hello!"}

	err = tpl.Execute(gohtml.NewWriter(os.Stdout), data)

	if err != nil {
		panic(err)
	}
}

Output:

<html>
  <head>
  </head>
  <body>
    Hello!
  </body>
</html>

Docs

GoDoc