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tidyhtml

GoDoc

This is a Go package for making HTML look tidy.

And by "tidy" I mean "exactly as I would write it by hand".

Overview

  • Parses HTML into a tree and then writes the output from scratch using said tree
  • Assumes HTML is well formed - no effort has been made to "battle test" this against invalid input
  • Indents elements by 4 spaces per level
  • Removes unnecessary whitespace except for indentation
  • Keeps elements with text as a single clump
  • Outputs <pre> blocks with no indentation so they display correctly
  • Performance has not been a priority

Usage

Get the package: go get github.com/raymondbutcher/tidyhtml

Example program, provided in the cmd directory:

package main

import (
	"fmt"
	"os"

	"github.com/raymondbutcher/tidyhtml"
)

func main() {
	if err := tidyhtml.Copy(os.Stdout, os.Stdin); err != nil {
		fmt.Fprintf(os.Stderr, "Error: %s", err)
		os.Exit(1)
	}
	fmt.Fprintln(os.Stdout)
}

Example

$ cat demo.in.html
<html>
<head>
<title>demo</title>
</head>
<body>
<div><h1>this is a demo</h1>
<p>
ok
</p>
<div><span>this will do</span></div></div>
</body></html>
$ cat demo.in.html | tidyhtml
<html>
    <head>
        <title>demo</title>
    </head>
    <body>
        <div>
            <h1>this is a demo</h1>
            <p>ok</p>
            <div>
                <span>this will do</span>
            </div>
        </div>
    </body>
</html>