如何从JavaScript中的urls列表中计算单词的出现次数？

// 假设我们有一个URL列表
const urls = [
    'https://example.com/page1',
    'https://example.com/page2',
    'https://example.com/page3'
];

// 用于存储单词出现次数的对象
const wordCount = {};

// 异步函数，用于从URL获取文本内容并计算单词出现次数
async function countWordsFromUrls(urls) {
    for (const url of urls) {
        try {
            const response = await fetch(url);
            const text = await response.text();
            const words = text.split(/\s+/); // 使用空白字符分割文本

            for (const word of words) {
                const cleanedWord = word.toLowerCase().replace(/[^a-z]/g, ''); // 清理单词
                if (cleanedWord) {
                    if (wordCount[cleanedWord]) {
                        wordCount[cleanedWord]++;
                    } else {
                        wordCount[cleanedWord] = 1;
                    }
                }
            }
        } catch (error) {
            console.error(`Error fetching ${url}:`, error);
        }
    }
}

// 调用函数
countWordsFromUrls(urls).then(() => {
    console.log(wordCount);
});