我正在将我编写的一些 Javascript 转换为 Deno TypeScript 模块。该脚本使用 deno-dom 从页面中获取所有“a[href]”链接，并返回链接列表。该脚本运行正常，但是，当我使用 deno test 测试代码时，它会报错

“TS2339 [错误]：属性‘getAttribute’在类型‘Node’上不存在”

我的理解是 Element 类型是 Node 类型的“类型”——但我尝试智能地声明这一点失败了。我在这里误解了什么？

这是有问题的完整函数：

import { DOMParser } from "https://deno.land/x/deno_dom/deno-dom-wasm.ts";

export async function getAllLinks(
  url: string,
  slice = 5,
): Promise<{ source: string; links: string[] }> {
  try {
    const response = await fetch(url);
    const content: string = await response.text();

    // Parse the HTML content using JSDOM
    const document = new DOMParser().parseFromString(content, "text/html");

    if (document === null) throw new Error("Failed to parse HTML");
    const baseUrl = response.url;

    // Find all links on the page
    const linkSelector = document.querySelectorAll(
      'a[href^="http:"], a[href^="https:"]',
    );

    if (linkSelector === undefined || linkSelector === null){
      throw new Error("No links found");
    }
    const links = Array.from(linkSelector, (link: Element) => link.getAttribute("href"))
      .map((link: string) => {
        // Convert relative links to absolute URLs
        const absoluteURL = new URL(link, baseUrl);
        return absoluteURL.href;
      })
      .filter((link: string) => {
        // Filter out links that are on the same domain as the URL
        const parsedUrl = new URL(url);
        const parsedLink = new URL(link);
        return parsedUrl.hostname !== parsedLink.hostname;
      });

    return {
      source: baseUrl,
      links: links.slice(0, slice),
    };
  } catch (error) {
    console.error(error);
    throw error;
  }
}

谢谢。

编辑：将 (link) 声明为 (link: Element) 会导致 Array.from 中它之前的 linkSelector 抱怨此错误：

No overload matches this call.
  Overload 1 of 4, '(iterable: Iterable<Element> | ArrayLike<Element>, mapfn: (v: Element, k: number) => string | null, thisArg?: any): (string | null)[]', gave the following error.
    Argument of type 'NodeList' is not assignable to parameter of type 'Iterable<Element> | ArrayLike<Element>'.
      Type 'NodeList' is not assignable to type 'ArrayLike<Element>'.
        'number' index signatures are incompatible.
          Type 'Node' is missing the following properties from type 'Element': attributes, classList, className, clientHeight, and 127 more.  Overload 2 of 4, '(arrayLike: ArrayLike<Element>, mapfn: (v: Element, k: number) => string | null, thisArg?: any): (string | null)[]', gave the following error.
    Argument of type 'NodeList' is not assignable to parameter of type 'ArrayLike<Element>'.deno-ts(2769)

并且还会破坏下一行 (link: string) 声明并出现此抱怨：

argument of type '(link: string) => string' is not assignable to parameter of type '(value: string | null, index: number, array: (string | null)[]) => string'.
  Types of parameters 'link' and 'value' are incompatible.
    Type 'string | null' is not assignable to type 'string'.
      Type 'null' is not assignable to type 'string'.deno-ts(2345)

更令人困惑的是，无论我选择什么类型声明，代码仍然可以完全正常执行。