pub fn add_event_listener(
  type_: String,
  listener: fn(Event) -> Nil,
) -> Nil

pub fn body() -> Element

pub fn create_element(tag_name: String) -> Element

pub fn create_text_node(content: String) -> Element

pub fn query_selector(selector: String) -> Result(Element, Nil)

pub fn query_selector_all(selector: String) -> Array(Element)