Javascript 如何在没有 jQuery 的情况下向 <html> 元素添加类？
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时间：2020-08-24 02:04:49 来源:igfitidea点击:
How do I add a class to the <html> element without jQuery?
提问by user940633
How do I add the class name "foo" to the root <html>element withoutusing jQuery (or a similar library)?
如何在不使用 jQuery（或类似库）的情况下将类名“foo”添加到根<html>元素？
回答by Oliver
You can usethe classListto access an element's list of classes.
document.documentElement.classList.add('my-awesome-class');
document.documentElement.classList.remove('my-awesome-class');
document.documentElement.classList.contains('my-awesome-class');
回答by Quentin
Just get the element and append to the list of classes.
只需获取元素并附加到类列表中即可。
document.documentElement.className += " foo";
回答by Igor Krupitsky
AddClass(document.documentElement, 'my-awesome-class', true); //add
AddClass(document.documentElement, 'my-awesome-class', false); //remove
function AddClass(o,c,bAdd){
var list = o.className.split(" ");
if (list.indexOf(c)!==-1){
if (!bAdd) delete list[list.indexOf(c)];
}else{
if (bAdd) list[list.length] = c;
}
o.className = list.join(" ");
}
