Hickory provides a namespace of selectors with functionality similar to CSS selectors, for selecting particular elements from a document tree.
This proof-of-concept provides a CSS-to-Hickory selector translator that can turn a CSS selector like this:
div#main > ul.styled a[href]
into a Hickory selector like this:
(s/descendant
(s/child
(s/and (s/tag :div) (s/id :main))
(s/and (s/tag :ul) (s/class :styled)))
(s/and (s/tag :a) (s/attr :href)))CSS selectors can be used as a concise syntax for extracting structured data from HTML documents.
Add a dependency:
{:deps {hickory-css-selector
{:git/url "https://github.com/taylorwood/hickory-css-selector"}}}Convert some HTML into Hickory, then select elements from it using CSS selector syntax:
(require '(hickory [core :as h] [select :as s]))
(def doc (h/as-hickory (h/parse (slurp "https://clojure.org"))))
(use 'hickory-css-selectors)
(s/select (parse-css-selector "a[href~=reference]") doc)
=>
[{:type :element,
:attrs
{:href "/reference/documentation", :class "w-nav-link clj-nav-link"},
:tag :a,
:content ["Reference"]}]$ clojure -A:testI welcome them!
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