instance method `highlight`

Ruby on Rails 4.2.9

Since v2.2.3

Available in: v2.2.3 v2.3.18 v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

highlight(text, phrases, options = {})

Highlights one or more phrases everywhere in text by inserting it into a :highlighter string. The highlighter can be specialized by passing :highlighter as a single-quoted string with \1 where the phrase is to be inserted (defaults to ‘<mark>\1</mark>’) or passing a block that receives each matched term.

highlight('You searched for: rails', 'rails')
# => You searched for: <mark>rails</mark>

highlight('You searched for: rails', /for|rails/)
# => You searched <mark>for</mark>: <mark>rails</mark>

highlight('You searched for: ruby, rails, dhh', 'actionpack')
# => You searched for: ruby, rails, dhh

highlight('You searched for: rails', ['for', 'rails'], highlighter: '<em>\1</em>')
# => You searched <em>for</em>: <em>rails</em>

highlight('You searched for: rails', 'rails', highlighter: '<a href="search?q=\1">\1</a>')
# => You searched for: <a href="search?q=rails">rails</a>

highlight('You searched for: rails', 'rails') { |match| link_to(search_path(q: match, match)) }
# => You searched for: <a href="search?q=rails">rails</a>

Parameters

text req
phrases req
options opt = {}

Source

# File actionview/lib/action_view/helpers/text_helper.rb, line 125
      def highlight(text, phrases, options = {})
        text = sanitize(text) if options.fetch(:sanitize, true)

        if text.blank? || phrases.blank?
          text || ""
        else
          match = Array(phrases).map do |p|
            Regexp === p ? p.to_s : Regexp.escape(p)
          end.join('|')

          if block_given?
            text.gsub(/(#{match})(?![^<]*?>)/i) { |found| yield found }
          else
            highlighter = options.fetch(:highlighter, '<mark>\1</mark>')
            text.gsub(/(#{match})(?![^<]*?>)/i, highlighter)
          end
        end.html_safe
      end

Defined in actionview/lib/action_view/helpers/text_helper.rb line 125 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActionView::Helpers::TextHelper

Signature

Parameters