Add Prettier documentation (2.5.1)

https://prettier.io/

assets/javascripts/news.json

@@ -1,6 +1,7 @@
 [
   [
     "2021-12-07",
+    "New documentation: <a href=\"/prettier/\">Prettier</a>",
     "Renamed documentation: <a href=\"/dom/\">Web APIs</a>"
   ],
   [

assets/javascripts/templates/pages/about_tmpl.coffee

@@ -666,6 +666,11 @@ credits = [
     '1996-2021 The PostgreSQL Global Development Group<br>&copy; 1994 The Regents of the University of California',
     'PostgreSQL',
     'https://www.postgresql.org/about/licence/'
+  ], [
+    'Prettier',
+    'James Long and contributors',
+    'MIT',
+    'https://raw.githubusercontent.com/prettier/prettier/main/LICENSE '
   ], [
     'Puppeteer',
     '2021 Google Inc',

lib/docs/filters/prettier/entries.rb

@@ -0,0 +1,27 @@
+module Docs
+  class Prettier
+    class EntriesFilter < Docs::EntriesFilter
+      def get_name
+        at_css('h1').children.select(&:text?).map(&:content).join.strip
+      end
+
+      def type
+        link = at_css('.navListItemActive')
+        section = link.ancestors('.navGroup').first
+        type = section.at_css('h3').content.strip
+        return name if type == 'Configuring Prettier'
+        return name if type == 'Usage'
+        type
+      end
+
+      def additional_entries
+        entries = []
+        css('.mainContainer h2').each do |node|
+          id = node.at_css('.anchor')['id']
+          entries << [node.text, id]
+        end
+        entries
+      end
+    end
+  end
+end

lib/docs/scrapers/prettier.rb

@@ -0,0 +1,25 @@
+module Docs
+  class Prettier < UrlScraper
+    self.name = 'Prettier'
+    self.type = 'simple'
+    self.release = '2.5.1'
+    self.base_url = 'https://prettier.io/docs/en/'
+    self.links = {
+      home: 'https://prettier.io/',
+      code: 'https://github.com/prettier/prettier'
+    }
+
+    # Docusaurus like react_native
+    html_filters.push 'prettier/entries', 'react_native/clean_html'
+
+    options[:container] = '.docMainWrapper'
+
+    options[:attribution] = <<-HTML
+      &copy; James Long and contributors
+    HTML
+
+    def get_latest_version(opts)
+      get_npm_version('prettier', opts)
+      end
+  end
+end

public/icons/docs/prettier/SOURCE

@@ -0,0 +1 @@
+https://prettier.io/icon.png