年度实用技巧 | 给不懂技术的朋友简单演示，代码是怎么被编写出来的

itemClick = function show(type) {
  let titleObj = {
    text: '姓名 :',
    radio: '性别 :',
    checkbox: '爱好 :',
    select: '早餐 :',
    textarea: '留言 :',
    link: '新闻 :',
  };
  let item = rightBottomArea[type];
  let itemTitle = titleObj[type];
  rightHeadTitle.innerHTML = itemTitle;
  rightHeadForm.innerHTML = item;
  rightBottom.style.display = 'block';
  rightBottomForm.innerHTML = item;
  copyText = item;
};

function copy() {
  // copy word
  if (copyText) {
    let transfer = document.createElement('input');
    document.body.appendChild(transfer);
    transfer.value = copyText;
    transfer.focus();
    transfer.select();
    if (document.execCommand('copy')) {
      document.execCommand('copy');
    }
    transfer.blur();
    document.body.removeChild(transfer);
    alert('已复制!');
  }
}