### Customizing Markdown Lowering with React Components and Custom Classes

Source: https://github.com/kiranshila/cybermonday/blob/master/README.md

Extend the lowering step by providing an options map to set default attributes for HTML tags and custom lowering functions. This example shows rendering math with a React component and applying a custom class to paragraphs.

```clojure
(ns main.core
  (:require
   [cybermonday.core :as cm]
   ["@matejmazur/react-katex" :as TeX]))

(defn lower-inline-math [[_ _ math]]
  [:> TeX {:math math}])

(cm/parse-md markdown {:default-attrs {:p {:class ["my-class"]}}
                       :lower-fns {:markdown/inline-math lower-inline-math}})
```

--------------------------------

### Soft Line Break IR Node

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Represents a soft line break in the IR AST. This typically renders as a newline without starting a new paragraph.

```clojure
[:markdown/soft-line-break {}]
```

--------------------------------

### Render KaTeX Math with Auto-render Extension

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Customize inline math delimiters for KaTeX rendering by overriding the default parsing behavior.

```clojure
(ns my-library
  (:require
   [cybermonday.core :as cn]))

(defn parse-math [[_ _ & [math]]]
  (str "$$" math "$$"))

(cm/parse-md "$`y=mx+b`$" {:markdown/inline-math parse-math})
```

--------------------------------

### Process Markdown AST with Templating

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/03-Templates.md

This function walks the Markdown AST and applies a template to string nodes, excluding code blocks. It uses pogonos for string rendering.

```clojure
(defn process-template [mdast template-vals]
  (clojure.walk/prewalk
   (fn [item] 
     (if (cybermonday.utils/hiccup? item)
       (let [[tag attrs & body] item]
         (if (not= tag :code)
           (cybermonday.utils/make-hiccup-node
            tag
            attrs
            (map #(if (string? %) 
                    (pogonos.core/render-string % template-vals)
                    %)
                 body))
           item))
       item))
   mdast))
```

--------------------------------

### IR Node Structure

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Illustrates the general structure of an IR node, comprising a namespaced keyword, an attribute map, and an optional body.

```clojure
[:markdown/keyword attr-map & body]
```

--------------------------------

### Add Anchor Links to Headings

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Customize heading lowering to automatically generate anchor links with unique IDs and appropriate attributes for navigation.

```clojure
(ns my-library
  (:require
   [clojure.string :as str]
   [cybermonday.utils :refer [gen-id make-hiccup-node]]
   [cybermonday.core :as cm]))

(defn lower-heading [[_ attrs & body :as node]]
  (make-hiccup-node
   (keyword (str "h" (:level attrs)))
   (dissoc
    (let [id (if (nil? (:id attrs))
               (gen-id node)
               (:id attrs))]
      (assoc attrs
             :id id
             :class "anchor"
             :href (str "#" id)))
    :level)
   body))

(parse-md "# A Heading" {:markdown/heading lower-heading})
```

--------------------------------

### Image IR Node

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Represents an image in the IR AST. Includes source URL, alt text, and an optional title.

```clojure
[:img {:src "cat.png" :alt "Witty alt-text" :title "More info"}]
```

--------------------------------

### Convert Markdown to Intermediate Representation (IR)

Source: https://github.com/kiranshila/cybermonday/blob/master/README.md

Obtain the direct Intermediate Representation (IR) of the markdown string. This is useful if you need to work with the AST before HTML conversion.

```clojure
(require '[cybermonday.ir :as cm-ir])

(cm-ir/md-to-ir my-markdown-str)
```

--------------------------------

### Split Content with HTML Comment Divider

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Capture and process HTML comments to implement content dividers, such as separating a blurb from a full article.

```clojure
(ns my-library
  (:require
   [clojure.string :as str]
   [cybermonday.core :as cm]))

(defn content-split [[_ _ body]])
  (when (str/includes? body "more")
    [:div {:class "content-split"}]))

(cm/parse-md "<!--more-->" {:markdown/html-comment content-split})
```

--------------------------------

### Image Reference IR Node

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Represents an image reference in the IR AST, similar to a link reference but for images.

```clojure
[:markdown/image-ref
 {:reference
  [:markdown/reference
   {:title "Foo"
    :label "1"
    :url "#baz"}]}
 "Bar"]
```

--------------------------------

### Auto Link IR Node

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Represents an automatically generated link in the IR AST. The :href attribute contains the link URL.

```clojure
[:markdown/autolink {:href "www.foo.bar"}]
```

--------------------------------

### Parse Markdown with Custom Options

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/01-Usage.md

Use the `parse-md` function to parse a markdown string. Customize lowering functions and default attributes for HTML tags.

```clojure
(parse-md my-md-string {:lower-fns {:markdown/node lower-node-fn}
                        :default-attrs {:p {:style {:color :red}}}}) 
```

--------------------------------

### Reference IR Node

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Represents a reference link in the IR AST. It includes a title, label, and URL for the reference.

```clojure
[:markdown/reference {:title "Title", :label "1", :url "/url"}]
```

--------------------------------

### Link IR Node

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Represents a hyperlink in the IR AST. The :href attribute specifies the URL, and :title is optional.

```clojure
[:a {:href "https://example.com" :title "A neat website"} "Click me"]
```

--------------------------------

### HTML Comment IR Node

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Represents an HTML comment in the IR AST.

```clojure
[:markdown/html-comment {} "I'm a comment!"]
```

--------------------------------

### Task List Item IR Node

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Represents a task list item in the IR AST, indicating checked state and list context.

```clojure
[:markdown/task-list-item
  {:checked? false, :ordered? false}
  [:p {} "Unchecked and unordered"]]
```

--------------------------------

### Heading IR Node

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Represents a heading in the IR AST. The :level attribute specifies the heading level (1-6).

```clojure
[:markdown/heading {:level 1} "Heading"]
```

--------------------------------

### Inline Math IR Node

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Represents inline mathematical expressions in the IR AST. Content is treated as text within a :pre block by default.

```clojure
[:markdown/inline-math {} "y=mx+b"]
```

--------------------------------

### Parse Markdown to HTML Hiccup

Source: https://github.com/kiranshila/cybermonday/blob/master/README.md

Use this function to convert a markdown string into an HTML hiccup representation. Ensure the cybermonday.core namespace is required.

```clojure
(require '[cybermonday.core :as cm])

(cm/parse-md my-markdown)
```

--------------------------------

### Mail Link IR Node

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Represents an email link in the IR AST. The :address attribute contains the email address.

```clojure
[:markdown/mail-link {:address "you@example.com"}]
```

--------------------------------

### Link Reference IR Node

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Represents a link reference in the IR AST, potentially containing a nested :markdown/reference node.

```clojure
[:markdown/link-ref
 {:reference
  [:markdown/reference
   {:title "Foo"
    :label "1"
    :url "#baz"}]}
 "Bar"]
```

--------------------------------

### Ordered List Item IR Node

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Represents an ordered list item in the IR AST. Used for standard numbered list items.

```clojure
[:markdown/ordered-list-item {} "Item"]
```

--------------------------------

### Bullet List Item IR Node

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Represents a bullet list item in the IR AST. Used for standard unordered list items.

```clojure
[:markdown/bullet-list-item {} "Item"]
```

--------------------------------

### Footnote Block IR Node

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Represents the content of a footnote in the IR AST. Includes the footnote ID and its content.

```clojure
[:markdown/footnote-block {:id "1" :content "I'm a footnote"}]
```

--------------------------------

### Footnote IR Node

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Represents a footnote marker in the IR AST. The :id attribute specifies the footnote identifier.

```clojure
[:markdown/footnote {:id "1"}]
```

--------------------------------

### Table Cell IR Node

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Represents a table cell in the IR AST. Attributes indicate if it's a header and its text alignment.

```clojure
[:markdown/table-cell {:header? true :alignment "center"}]
```

--------------------------------

### Fenced Code Block IR Node

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Represents a fenced code block in the IR AST. The :language attribute specifies the programming language.

```clojure
[:markdown/fenced-code-block {:language "julia"} "code"]
```

--------------------------------

### Indented Code Block IR Node

Source: https://github.com/kiranshila/cybermonday/blob/master/doc/02-AST.md

Represents an indented code block in the IR AST. This is typically used for code blocks that are indented by four spaces.

```clojure
[:markdown/indented-code-block {} "code"]
```

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