Function extractHeadline

packages/core/src/utils/html-parser.ts:221–254

(html: string, characterLimit: number)

}

export function extractHeadline(html: string, characterLimit: number) {
  let text = "";
  let start = false;
  const parser = new Parser(
    {
      onopentag: (name) => {
        if (name === "p") start = true;
      },
      onclosetag: (name) => {
        if (name === "p") {
          start = false;
          parser.pause();
          parser.end();
        }
      },
      ontext: (data) => {
        if (start) {
          text += data;
          if (text.length > characterLimit) {
            text = text.slice(0, characterLimit);
            parser.pause();
            parser.end();
          }
        }
      }
    },
    {
      lowerCaseTags: false,
      decodeEntities: true
    }
  );
  parser.end(html);
  return text;
}

const TITLE_SOURCE_TAGS = ["p", "h1", "h2", "h3", "h4", "h5", "h6"];