JavaScript 小技巧

• 自适应获取窗口宽高

  function getWindowSize() {
      //获取窗口宽度
      if (window.innerWidth)
          winWidth = window.innerWidth;
      else if ((document.body) && (document.body.clientWidth))
          winWidth = document.body.clientWidth;
      //获取窗口高度
      if (window.innerHeight)
          winHeight = window.innerHeight;
      else if ((document.body) && (document.body.clientHeight))
          winHeight = document.body.clientHeight;
      //通过深入 Document 内部对 body 进行检测，获取窗口大小
      if (document.documentElement && document.documentElement.clientHeight && document.documentElement.clientWidth) {
          winHeight = document.documentElement.clientHeight;
          winWidth = document.documentElement.clientWidth;
      }
      //结果输出至两个文本框
      return {
          width: winWidth,
          height: winHeight
      };
  }