How can I remove certain HTML tags by name in Ruby?
For example:
string = "<!DOCTYPE html><html><body><h1>My First Heading</h1><p>My first paragraph.</p></body></html>"
string.magic_method("h1") #=> "<!DOCTYPE html><html><body><p>My first paragraph.</p></body></html>"
I wrote some regex to do this but wondered if there was a library or native method that could do the same thing.
Using Nokogiri:
require 'nokogiri'
doc = Nokogiri::HTML <<-_HTML_
<!DOCTYPE html><html><body><h1>My First Heading</h1><p>My first paragraph.</p></body></html>
_HTML_
doc.at('h1')
# => #(Element:0x4d2f006 {
# name = "h1",
# children = [ #(Text "My First Heading")]
# })
doc.at('h1').unlink
puts doc.to_html
# >> <!DOCTYPE html>
# >> <html><body><p>My first paragraph.</p></body></html>
Use the gem nokogiri. It has some nice methods to manipulate HTML and XML, including one that removes tags as you can see here: How do I remove a node with Nokogiri?
