class selector Description:Selects all elements with the given class. version added:1.0jQuery( ".class" ) class:A class to search for. An element can have multiple classes; only one of them must match. For class selectors, jQuery uses JavaScript's nativegetElementsByClassName()function if the...
The #id selector selects the element with the specific id.The id refers to the id attribute of an HTML element.Note: The id attribute must be unique within a document.Note: Do not start an id attribute with a number. It may cause problems in some browsers....
This code selects an element with an ID of "myDivId". Since IDs are unique, this expression always selects either zero or one elements depending upon whether or not an element with the specified ID exists. 1 $( "#myDivId" ); This code selects an element with a class of "myCss...
//事实证明通过如下方式不管传入的是id选择器还是class选择器都是可行的document.querySelectorAll(selector) 获取DOM中的第几个元素 代码语言:javascript 代码运行次数:0 运行 AI代码解释 // 因为我们获取到的是一个NodeList数组,那么当然可以通过下标获取(注意不要越界)document.querySelectorAll(selector)[0] ...
$("#ID"):id选择器 $(".class"):class选择器 $(".cladd,p,#ID"):组合选择器 层级选择器: $("x y"):x的所有后代标签 $("x>y"):x的所有子代标签 $("x+y"):x下一个兄弟标签 $("x~y"):x的所有兄弟标签 属性选择器: [attribute] [attribute=value] :属性等于 [attribute!=value]:属性...
$("#id") //ID选择器 $("div") //元素选择器 $(".classname") //类选择器 $(".classname,.classname1,#id1") //组合选择器 * 选择所有元素 .class 选择class,如:$(‘.mybox’) element 选择element,如:$(‘p’) #id 选择id,如:$(‘#box’) selector1,selectorN 可以同时选择多个元素,如...
* Universal selector TAG element type selector .class class name selector #id id selector [attr] Attribute selector, with all matchers: CSS2: = | |= | ~= CSS3: ^= | $= ^ *= jQuery: != E, F#id Selector grouping E F Descendant selector E>F Child selector E+F Adjacent sib...
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So, on the pro side, it saves a few characters in the selector string. On the con side, it's not a standard W3C selector, it's slower, it's more code in core for an edge case, and it has simple alternatives available like attaching a class to the children or just using the cu...
Description: Selects all elements with the given class. version added: 1.0jQuery( ".class" ) class: A class to search for. An element can have multiple classes; only one of them must match. For class selectors, jQuery uses JavaScript's native getElementsByClassName() function if the ...