问题
How can I check if body has specific class? This is my case:
<body class="foo foo1 foo3"></body>
回答1:
function hasClass(ele,cls) {
return ele.className.match(new RegExp('(\\s|^)'+cls+'(\\s|$)'));
}
if(hasClass(document.getElementById("test"), "test")){//do something};
maybe this helps you :-)
With the use of jQuery it would be easier and less code but nevermind !
回答2:
There's now a super-easy way to do this:
document.body.classList.contains('my-class-name')
回答3:
document.getElementsByTagName("body")[0].className.match(/foo/)
回答4:
jQuery.hasClass works for me...
non jQuery answer, try if( document.body.className.match('foo') ) { ... }
回答5:
You can use the Mozilla classList for this.
The linked page also has a cross-browser solution.
回答6:
This returns a string of true or false when looking for a specific body class using jQuery's .hasClass:
$("body").hasClass("your-class-name").toString();
回答7:
This returns a string of true or false when looking for a specific body class using jQuery's .hasClass:
if ($("body").hasClass("modal-open")) {
$("body").removeClass("modal-open");
}
来源：https://stackoverflow.com/questions/9532639/how-check-if-body-has-a-specific-class-with-javascript