children

jQuery selectors performance

由 半城伤御伤魂 提交于 2019-12-05 16:55:26
I know I'm just being OCD about a few milliseconds worth of performance time, but I was just wondering why the following is true for me. It seems goes against my logic. I currently have a div that has fades out the image inside on hover: $('div.someclass').hover(function() { $(this).children('img').fadeOut(function(){ // do something }); }, function() { // do something }); After some testing, (looping through selectors 1000 times, taking the average of 9 tests) I have used 3 different selectors and concluded that the speed is in this order: $(this).children('img') runs the fastest -avg about

Find parent and first child of it's parent

由 梦想与她 提交于 2019-12-05 16:41:48
问题 I am trying to find the parent of an element and it's parent first child, the code is like this: <ul class="lowerMenu"> <li><a href="" class="selected">Welcome</a></li> <li><a href="">Logo</a></li> <li><a href="">Websites</a></li> <li><a href="">Stationery</a></li> <li><a href="">Illustration</a></li> <li><a href="">Full Pack</a></li> </ul> function setIntervalAndExecute() { changeImages(); setTimeout(function(){ showImages(imagesArray); },500); var intervalot = window.setInterval(function(){

Adding delay to jquery event on mouseover

由 你离开我真会死。 提交于 2019-12-05 16:40:19
I am trying to add a simple delay to a mouseover event of a child and having difficulties. (Still learning!) This enables me to show the popup after a delay, but shows all of them simultaneously: onmouseover='setTimeout(function() { $(\".skinnyPopup\").show(); }, 600)' and this works to show only the popup I want with no delay: onmouseover='$(this).children(\".skinnyPopup\").show()' but the combination does not: onmouseover='setTimeout(function() { $(this).children(\".skinnyPopup\").show(); }, 600)' Any help would be appreciated. Thanks! Nick Craver You need to define what this is when it

Bind element and its children in jQuery

由 假装没事ソ 提交于 2019-12-05 12:10:21
I'd like to bind an event to an element and its children. What is the best way to do this? $(element).bind('click', function(event) { doSomething(); }); $(element).bind('click', function(event) { doSomething(); }).children().bind("click",function(event){ // code to handle children click here event.stopPropagation(); // if you don't want event to bubble up }); The code you have will do just that. Look in the event's target field to find out which actual child node saw the event. 来源： https://stackoverflow.com/questions/5728178/bind-element-and-its-children-in-jquery

Wrapping range of children elements in a div

由 蓝咒 提交于 2019-12-05 10:33:51
I'm trying to wrap a range of children elements in div in order to manipulate them in groups; trying to position each group in a different place. The scenario is that I have a list randomly generating li tags and no matter how many appear I need every set of ten to be manipulated separately. To figure this out I'm using a written out list: $("ul li ul li:nth-child(n+11)").wrapAll("<span class='shift' />"); <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <div id="access"> <div class="menu"> <ul> <li> <p>Hello</p> <ul> <li>Stuff</li> <li>Stuff</li> <li

ReactJS中的自定义组件

由 寵の児 提交于 2019-12-05 09:01:37
可控自定义组件： <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <script src="js/react.js"></script> <script src="js/react-dom.js"></script> <script src="js/browser.min.js"></script> </head> <body> <script type="text/babel"> var Radio=React.createClass({ getInitialState:function(){ return { value:this.props.defaultValue }; }, handleChange:function(event){ if(this.props.onChange){ this.props.onChange(event); } this.setState({ value:event.target.value }); }, render:function(){ var children=[]; var value=this.props.value||this.state.value; React.Children.forEach(this.props.children

Java Dom parser reports wrong number of child nodes

由 女生的网名这么多〃 提交于 2019-12-05 07:23:03
I have the following xml file: <?xml version="1.0" encoding="UTF-8"?> <users> <user id="0" firstname="John"/> </users> Then I'm trying to parse it with java, but getchildnodes reports wrong number of child nodes. Java code: DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = factory.newDocumentBuilder(); Document document = builder.parse(this.file); document.getDocumentElement().normalize(); Element root = document.getDocumentElement(); NodeList nodes = root.getChildNodes(); System.out.println(nodes.getLength()); Result: 3 Also I'm getting NPEs for

How to iterate over children with for-loop

由 怎甘沉沦 提交于 2019-12-05 01:21:00
I want to iterate over all childs of a jQuery's .children() return value, like this: var childs = $element.children(); for (var i = 1; i < childs.length - 1; i++) childs__.foo(); What do I have to write in the 3 line instead of __ , to access the i-th child? I want this becaus I want to access the (i-1)-th and (i+1)-th child in the loop, like this: var childs = $element.children(); for (var i = 1; i < childs.length - 1; i++) { childs<<i>>.css('height', childs<<i - 1>>.height()); childs<<i>>.css('width', childs<<i + 1>>.width()); } So I assume the each() function will not work. childs is a

Kill bash script foreground children when a signal comes

由 我们两清 提交于 2019-12-05 00:08:11
I am wrapping a fastcgi app in a bash script like this: #!/bin/bash # stuff ./fastcgi_bin # stuff As bash only executes traps for signals when the foreground script ends I can't just kill -TERM scriptpid because the fastcgi app will be kept alive. I've tried sending the binary to the background: #!/bin/bash # stuff ./fastcgi_bin & PID=$! trap "kill $PID" TERM # stuff But if I do it like this, apparently the stdin and stdout aren't properly redirected because it does not connect with lighttpds mod_fastgi, the foreground version does work. EDIT: I've been looking at the problem and this happens

JavaScript 递归遍历json串获取相关数据

由 ◇◆丶佛笑我妖孽 提交于 2019-12-04 17:51:25
递归遍历 json 串获取相关数据 by: 授客 QQ ： 1033553122 1. 测试数据 // 导航菜单 [ { id: 1, parentId: 0, parentName: null, name: "首页", url: "/home", perms: null, requireAuth: true, hidden: false, type: 0, icon: "fa fa-home fa-lg",a orderNum: 1, level: 0, children: [ { id: 2, parentId: 1, parentName: null, name: "首页二级菜单1", url: "", perms: null, requireAuth: true, hidden: false, type: 1, icon: "fa fa-home fa-lg", orderNum: 1, level: 0, children: [ { id: 3, parentId: 2, parentName: null, name: "首页三级菜单1", url: "", perms: null, requireAuth: true, hidden: false, type: 1, icon: "fa fa-home fa-lg", orderNum: 1, level: 0,
订阅 children