如何解决此打字稿错误：属性“ nodename”不存在

Question

代码行是

 readXML(): void {
    // testing the function
    let xmlstr = `<book><title>Some title</title>
                  <description>some description </description>
                  <author>
                      <id>1</id>
                      <name>some author name</name>
                  </author>
                  <review>nice book</review>
                  <review>this book sucks</review>
                  <review>amazing work</review></book>
                  `;

    // converting to DOM Tree
    const parser = new DOMParser();
    const srcDOM = parser.parseFromString(xmlstr, "application/xml");
    // Converting DOM Tree To JSON. 
    console.log(this.xml2json(srcDOM));
  }


  xml2json(srcDOM): any {
    const children = Array.from(srcDOM.children);

    // base case for recursion. 
    if (!children.length) {
      return srcDOM.innerHTML
    }

    // initializing object to be returned. 
    let jsonResult = {};

    for (let child of children) {
      // checking is child has siblings of same name. 
      let childIsArray = children.filter(eachChild => eachChild.nodeName === child.nodeName).length > 1;

      // if child is array, save the values as array, else as strings. 
      if (childIsArray) {
        if (jsonResult[child.nodeName] === undefined) {
          jsonResult[child.nodeName] = [this.xml2json(child)];
        } else {
          jsonResult[child.nodeName].push(this.xml2json(child));
        }
      } else {
        jsonResult[child.nodeName] = this.xml2json(child);
      }
    }

    return jsonResult;
  };

此项目有问题eachchild.nodeName，并引发以下错误 Property 'nodeName' does not exist on type '{}'.

代码按预期运行...我如何告诉Typescript该对象是什么并且它确实具有该属性？

谢谢！

上下文：我正在遍历XML字符串。