HTML-Javascript 小技巧汇总

• 按照网页坐标寻找页面元素
  Document: elementFromPoint() method

  document.elementFromPoint(x, y)
  document.elementsFromPoint(x, y)

• 不用JQuery查看网页元素是否可见 checkVisibility
  Element: checkVisibility() method

  elementToCheck.checkVisibility()