1.用CSS.supports()方法 mark-zhq[3]
//判断是否支持flex布局var supportsFlex = CSS.supports("display", "flex");//判断是否支持rem单位var supportsRem = CSS.supports("width","1rem");//判断兼容性属性var supportsAPS = CSS.supports("animation-play-state")||CSS.supports("-webkit-animation-play-state")||CSS.supports("-ms-animation-play-state")||CSS.supports("-Moz-animation-play-state")||CSS.supports("-o-animation-play-state");
注:这里只针对支持CSS.supports的浏览器,Opera浏览器使用的是不同的方法名。
判断是否支持该方法:(如果不支持的话可用第三方库Modernizr)
var supportsCSS = !!((window.CSS && window.CSS.supports) || window.supportsCSS || false);
2.查找document.documentElement.style是否存在要查询的属性
function isString(value){ return typeof value == "string";}var docStyle = document.documentElement.style;var supportsAPS = isString(docStyle.animationPlayState)||isString(docStyle.webkitanimationPlayState)||isString(docStyle.MozanimationPlayState)||isString(docStyle.msanimationPlayState)||isString(docStyle.oanimationPlayState);
这里不会涉及到实例化,所以可以用typeof去判断数据类型。综合来说第一种方法较好,第二种方法可以帮助理解CSS。

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