点击hasClass('redColor')的效果与点击is('.redColor')后的效果相同,点击reset的效果与初始效果相同。
1、is(expr|obj|ele|fn)的方法几个参数表示什么? 参数可以是表达式,可以是jquery对象,可以是元素,可以是函数 2、hasClass()和is()的关系是什么? hasclass() 检查当前的元素是否含有某个特定的类,如果有,则返回true。 这其实就是 is("." + class)。 二、使用jquery判断一个元素是否含有一个指定的类(class...
Check if any element has a class named "intro": $("button").click(function(){ alert($("p").hasClass("intro")); }); Try it Yourself » Definition and Usage The hasClass() method checks if any of the selected elements have a specified class name. If ANY...
5、还可以使用hasClass()方法检查元素是否具有指定的class,检查ID为myElement的元素是否具有名为checkClass的class: if ($("#myElement").hasClass("checkClass")) { console.log("元素具有指定的class"); } else { console.log("元素没有指定的class"); } 6、使用attr()方法修改元素的class属性,将ID为my...
body><h1>jQuery check if an element has a certain class</h1><divclass=...
if(elem.nodeType === 1){ //如果没有class属性 或class属性为空字符串 classNames.length ===1 ,多于一个去重 if(!elem.className && classNames.length === 1){ elem.className = value; }else{//已有className 或 classNames长度大于1 setClass = " " + elem.className + " "; ...
set( this, "__className__", className ); } // If the element has a class name or if we're passed `false`, // then remove the whole classname (if there was one, the above saved it). // Otherwise bring back whatever was previously saved (if anything), // falling back to the ...
1 The .hasClass() method will return true if the class is assigned to an element, even if other classes also are. For example, given the HTML above, the following will return true: 1 $( "#mydiv" ).hasClass( "foo" ) As would: 1 $( "#mydiv" ).hasClass( "bar" ) Whil...
if ( $( "#myDiv" ).is( ".pretty.awesome" ) ) { $( "#myDiv" ).show(); } Note that this method allows you to test for other things as well. For example, you can test whether an element is hidden (by using the custom :hidden selector): 1 2 3 4 5 if ( $( "#myD...
('.test') $('.test input').iCheck({ handle: 'checkbox' }); // handle .vote class elements (will search inside the element, if it's not an input) $('.vote').iCheck(); // you can also change options after inputs are customized $('input.some').iCheck({ // different ...