How can I select an element with multiple classes in jQuery?

I want to select all the elements that have the two classes a and b . <element class="a b"> So, only the elements that have both classes. When I use $(".a, .b") it gives me the union, but I want the intersection. If you want an intersection, just write the selectors together without spaces in between. $('.a.b') So for an element that has an ID of a with classes b and c , y

我如何在jQuery中选择一个包含多个类的元素?

我想选择所有具有两个类a和b的元素。 <element class="a b"> 所以,只有这两个类的元素。 当我使用$(".a, .b")它给了我工会,但我想要交集。 如果你想要一个十字路口,只需将选择器写在一起, 不要在它们之间留有空格 。 $('.a.b') 因此,对于ID为a和b和c的元素,可以这样写: $('#a.b.c') 你可以使用filter()函数来做到这一点: $(".a").filter(".b") 对于这种情况 <element class="a"> <

jQuery get specific option tag text

All right, say I have this: <select id='list'> <option value='1'>Option A</option> <option value='2'>Option B</option> <option value='3'>Option C</option> </select> What would the selector look like if I wanted to get "Option B" when I have the value '2'? Please note that this is not asking how to get the selected t

jQuery获取特定的选项标签文本

好吧,说我有这个: <select id='list'> <option value='1'>Option A</option> <option value='2'>Option B</option> <option value='3'>Option C</option> </select> 当我的值为'2'时,如果我想获得“选项B”,选择器会是什么样子? 请注意,这不是要求如何获取选定的文本值,而只是其中的任何一个,无论是否选择,取决于value属性。 我试过了: $("#l

Inverse of jQuery.extend(true, …)

I'm looking to reduce storage requirements for JSON data by deltifying it against a known set of defaults. Basically, what I want is an inverse for jQuery's .extend() function, such that the following test passes for arbitrary JSON-compatible objects: function test_delta(defaults, delta) { var current = $.extend(true, {}, defaults, delta); QUnit.same(get_delta(current, defaults

jQuery.extend的反转(true,...)

我期望通过将它与一组已知的默认值进行对照来减少JSON数据的存储需求。 基本上,我想要的是jQuery的.extend()函数的反例,以便以下测试传递给任意JSON兼容对象: function test_delta(defaults, delta) { var current = $.extend(true, {}, defaults, delta); QUnit.same(get_delta(current, defaults), delta); } 在我开始编写我自己的get_delta() ,有没有人知道现有的实现? 你真正想要的是一个对象差异(erent

AngularJS : Factory and Service?

This question already has an answer here: AngularJS: Service vs provider vs factory 30 answers Service vs Factory The difference between factory and service is just like the difference between a function and an object Factory Provider Gives us the function's return value ie. You just create an object, add properties to it, then return that same object.When you pass this service int

AngularJS:工厂和服务?

这个问题在这里已经有了答案: AngularJS:服务vs提供者vs工厂30个答案 服务与工厂 工厂和服务之间的区别就像功能和对象之间的区别 工厂提供商 给我们函数的返回值,即。 您只需创建一个对象,为其添加属性,然后返回相同的对象。当您将此服务传递到您的控制器时,对象上的这些属性现在将通过您的工厂在该控制器中可用。 (假设情景) 单身人士,只会被创建一次 可重复使用的组件 工厂是控制器之间进行通信的

What is the difference between angular

I'm planning to use AngularJS in my big applications. So I'm in the process to find out the right modules to use. What is the difference between ngRoute (angular-route.js) and ui-router (angular-ui-router.js) modules? In many articles when ngRoute is used, route is configured with $routeProvider . However, when used with ui-router, route is configured with $stateProvider and $urlRou

角度有什么区别?

我正计划在我的大型应用程序中使用AngularJS。 所以我正在找出正确的模块来使用。 ngRoute(angular-route.js)和ui-router(angular-ui-router.js)模块有什么区别 ? 在使用ngRoute的许多文章中,路由配置为$ routeProvider 。 但是,使用ui-router时,路由配置为$ stateProvider和$ urlRouterProvider 。 我应该使用哪个模块以获得更好的可管理性和可扩展性? ui-router是第三方模块,功能非常强大。 它支持ngRout

What is the difference between Polymer elements and AngularJS directives?

On the Polymer Getting Started page, we see an example of Polymer in action: <html> <head> <!-- 1. Shim missing platform features --> <script src="polymer-all/platform/platform.js"></script> <!-- 2. Load a component --> <link rel="import" href="x-foo.html"> </head> <body> <!-- 3. Declare the component by its tag.

Polymer元素和AngularJS指令有什么区别?

在Polymer入门页面上,我们看到Polymer实例的一个示例: <html> <head> <!-- 1. Shim missing platform features --> <script src="polymer-all/platform/platform.js"></script> <!-- 2. Load a component --> <link rel="import" href="x-foo.html"> </head> <body> <!-- 3. Declare the component by its tag. --> <x-foo>

Creating common controller functions

How do I create some sort of utils bundle that would be accessible from all my controllers? I have this route code in my main module: 'use strict'; angular.module('lpConnect', []). config(['$routeProvider', function($routeProvider) { $routeProvider. when('/home', {template: 'views/home.html', controller: HomeCtrl}). when('/admin', {template: 'views/admin.html', control

创建通用控制器功能

我如何创建某种可以从我的所有控制器访问的utils bundle? 我的主模块中有这个路由代码: 'use strict'; angular.module('lpConnect', []). config(['$routeProvider', function($routeProvider) { $routeProvider. when('/home', {template: 'views/home.html', controller: HomeCtrl}). when('/admin', {template: 'views/admin.html', controller: AdminCtrl}). when('/connect', {templa

How do I get the current date in JavaScript?

如何在JavaScript中获取当前日期? 使用new Date()生成一个包含当前日期和时间的新Date对象。 var today = new Date(); var dd = today.getDate(); var mm = today.getMonth()+1; //January is 0! var yyyy = today.getFullYear(); if(dd<10) { dd = '0'+dd } if(mm<10) { mm = '0'+mm } today = mm + '/' + dd + '/' + yyyy; document.write(today); var utc = new Date().toJSON().slice(0,

如何在JavaScript中获取当前日期?

如何在JavaScript中获取当前日期? 使用new Date()生成一个包含当前日期和时间的新Date对象。 var today = new Date(); var dd = today.getDate(); var mm = today.getMonth()+1; //January is 0! var yyyy = today.getFullYear(); if(dd<10) { dd = '0'+dd } if(mm<10) { mm = '0'+mm } today = mm + '/' + dd + '/' + yyyy; document.write(today); var utc = new Date().toJSON().slice(0,

Using bitwise OR 0 to floor a number

A colleague of mine stumbled upon a method to floor float numbers using a bitwise or: var a = 13.6 | 0; //a == 13 We were talking about it and wondering a few things. How does it work? Our theory was that using such an operator casts the number to an integer, thus removing the fractional part Does it have any advantages over doing Math.floor ? Maybe it's a bit faster? (pun not intend

使用按位或0来放置一个数字

我的一位同事偶然发现了一种使用按位或下列方法设置浮点数的方法: var a = 13.6 | 0; //a == 13 我们在谈论它,并想知道一些事情。 它是如何工作的? 我们的理论是使用这样的操作符将数字转换为整数,从而消除小数部分 与Math.floor相比,它有什么优势吗? 也许它快一点? (双关不打算) 它有什么缺点吗? 也许它在某些情况下不起作用? 明确是一个明显的问题,因为我们必须弄清楚,而且,我正在写这个问题。

Regular expression for line match without specific word

I'm trying to create regular expression that math only lines that not containing specific word at the beginning of the line. In my case "deamon:". My regex: (?!d)(?!e)(?!a)(?!m)(?!o)(?!n)(?!:).*n But this match the rest of line behind "deamon:" too, what I don't want. Input: deamon: parsing arguments... deamon: parsing xml file... deamon: creating xml file for de

没有特定单词的线匹配的正则表达式

我试图创建正则表达式,该数学只包含行的开头不包含特定单词的行。 在我的情况下“deamon:”。 My regex: (?!d)(?!e)(?!a)(?!m)(?!o)(?!n)(?!:).*n 但是这与“deamon:”背后的其他部分相匹配,也是我不想要的。 输入: deamon: parsing arguments... deamon: parsing xml file... deamon: creating xml file for demo... deamon: executing demo parsing arguments... path to xml: /home/www/www/seg-chapter/tests/users/1/