先看各浏览器的兼容性:classList的兼容性
在chrome浏览器控制台中输入以下命令得到:
>document.body.classList <!--结果:--> ["is-home", value: "is-home"] length:1 value:"is-home" 0:"is-home" __proto__:DOMTokenList add:function add() contains:function contains() entries:function entries() forEach:function forEach() item:function item() keys:function keys() length:(...) remove:function remove() supports:function supports() toString:function toString() toggle:function toggle() value:(...) values:function values() constructor:function DOMTokenList() Symbol(Symbol.iterator):function values() Symbol(Symbol.toStringTag):"DOMTokenList" get length:function () get value:function () set value:function () __proto__:Object()
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