html_parser

html_parser is a simple library for parsing an HTML document. Use html_parser.as_list to parse the document as List of Elements. Use html_parser.as_tree to create a nested structure where Elements have children.

• StartElement: HTML opening tag, like <div>
• EndElement: HTML closing tag, like </div>
• Content: Non-HTML parts of the document inside tags (the “hello” in <div>hello</div>)
• Attributes: HTML attributes inside of a tag (href key and value in <a href="github.com">)

gleam add html_parser@1

import html_parser

pub fn main() {
  "<div><div class=\"data\">Data!</div></div>"
  |> html_parser.as_list
  |> find_div
  |> io.debug
}

// find a starting div where class=data and the next element is Content
fn find_div(in: List(html_parser.Element)) -> String {
  case in {
    [] -> "Not found"
    [
      html_parser.StartElement("div", [html_parser.Attribute("class", "data")], _),
      html_parser.Content(contents),
      ..
    ] -> contents
    [_, ..tail] -> find_div(tail)
  }
}

Further documentation can be found at https://hexdocs.pm/html_parser.

Development

gleam run   # Run the project
gleam test  # Run the tests