JavaScript 小技巧

自适应获取窗口宽高

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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
    };
}