Module: ERB::Util

Defined in:
activesupport/lib/active_support/core_ext/string/output_safety.rb

Constant Summary

HTML_ESCAPE = 
{ '&' => '&amp;',  '>' => '&gt;',   '<' => '&lt;', '"' => '&quot;' }
JSON_ESCAPE = 
{ '&' => '\u0026', '>' => '\u003E', '<' => '\u003C' }

Instance Method Summary (collapse)

Instance Method Details

- (Object) html_escape(s) Also known as: h

A utility method for escaping HTML tag characters. This method is also aliased as h.

In your ERb templates, use this method to escape any unsafe content. For example:

<%=h @person.name %>

Example:

puts html_escape("is a > 0 & a < 10?")
# => is a &gt; 0 &amp; a &lt; 10?


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# File 'activesupport/lib/active_support/core_ext/string/output_safety.rb', line 18

def html_escape(s)
  s = s.to_s
  if s.html_safe?
    s
  else
    s.gsub(/[&"><]/) { |special| HTML_ESCAPE[special] }.html_safe
  end
end

- (Object) json_escape(s) Also known as: j

A utility method for escaping HTML entities in JSON strings. This method is also aliased as j.

In your ERb templates, use this method to escape any HTML entities:

<%=j @person.to_json %>

Example:

puts json_escape("is a > 0 & a < 10?")
# => is a \u003E 0 \u0026 a \u003C 10?


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# File 'activesupport/lib/active_support/core_ext/string/output_safety.rb', line 44

def json_escape(s)
  s.to_s.gsub(/[&"><]/) { |special| JSON_ESCAPE[special] }
end