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Showing content from https://github.com/threedaymonk/htmlbeautifier below:

threedaymonk/htmlbeautifier: A normaliser/beautifier for HTML that also understands embedded Ruby. Ideal for tidying up Rails templates.

A normaliser/beautifier for HTML that also understands embedded Ruby. Ideal for tidying up Rails templates.

• Normalises hard tabs to spaces (or vice versa)
• Removes trailing spaces
• Indents after opening HTML elements
• Outdents before closing elements
• Collapses multiple whitespace
• Indents after block-opening embedded Ruby (if, do etc.)
• Outdents before closing Ruby blocks
• Outdents elsif and then indents again
• Indents the left-hand margin of JavaScript and CSS blocks to match the indentation level of the code

To update files in-place:

$ htmlbeautifier file1.html.erb [file2.html.erb ...]

or to operate on standard input and output:

$ htmlbeautifier < untidy.html.erb > formatted.html.erb

require 'htmlbeautifier'

beautiful = HtmlBeautifier.beautify(untify_html_string)

You can also specify how to indent (the default is two spaces):

beautiful = HtmlBeautifier.beautify(untidy_html_string, indent: "\t")

This is a Ruby gem. To install the command-line tool (you may need sudo):

$ gem install htmlbeautifier

To use the gem with Bundler, add to your Gemfile:

1. Follow these guidelines when writing commit messages (briefly, the first line should begin with a capital letter, use the imperative mood, be no more than 50 characters, and not end with a period).
2. Include tests.

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