从嵌套数组创建HTML元素

function createHTMLElements(arr) {
  let html = '';

  for (let i = 0; i < arr.length; i++) {
    const item = arr[i];

    if (Array.isArray(item)) {
      html += createHTMLElements(item);
    } else if (typeof item === 'object') {
      const { tag, attributes, children } = item;
      const attrs = Object.entries(attributes || {})
        .map(([key, value]) => `${key}="${value}"`)
        .join(' ');

      html += `<${tag} ${attrs}>${createHTMLElements(children)}</${tag}>`;
    } else {
      html += item;
    }
  }

  return html;
}

const nestedArray = [
  'Hello, ',
  { tag: 'strong', attributes: {}, children: ['world'] },
  '!',
  [
    { tag: 'p', attributes: { class: 'description' }, children: ['This is a nested array example.'] },
    'Have a nice day!'
  ]
];

const result = createHTMLElements(nestedArray);
console.log(result);