How does data binding work in AngularJS?

How does data binding work in the AngularJS framework? I haven't found technical details on their site. It's more or less clear how it works when data is propagated from view to model. But how does AngularJS track changes of model properties without setters and getters? I found that there are JavaScript watchers that may do this work. But they are not supported in Internet Explorer

数据绑定在AngularJS中如何工作?

数据绑定在AngularJS框架中如何工作? 我没有在他们的网站上找到技术细节。 当数据从视图传播到模型时,它如何工作或多或少都很清楚。 但是,AngularJS如何在没有setter和getters的情况下跟踪模型属性的变化? 我发现有JavaScript观察者可以做这项工作。 但是它们在Internet Explorer 6和Internet Explorer 7中不受支持。那么,AngularJS如何知道我改变了以下内容并在视图上反映了这种变化? myobject.myproperty="new va

jQuery scroll to element

I have this input element: <input type="text" class="textfield" value="" id="subject" name="subject"> Then I have some other elements, like other text inputs, textareas, etc. When the user clicks on that input with #subject , the page should scroll to the last element of the page with a nice animation. It should be a scroll to bottom and not to top. The last item of the page is a sub

jQuery滚动到元素

我有这个input元素: <input type="text" class="textfield" value="" id="subject" name="subject"> 然后我还有一些其他元素,如其他文本输入,textareas等。 当用户用#subject单击该input时,页面应该以良好的动画滚动到页面的最后一个元素。 它应该是一个滚动到底部而不是顶部。 该页面的最后一个项目是一个submit按钮,其中包含#submit : <input type="submit" class="submit" id="submit" name="submit" v

Disable/enable an input with jQuery?

$input.disabled = true; or $input.disabled = "disabled"; Which is the standard way? And, conversely, how do you enable a disabled input? jQuery 1.6+ To change the disabled property you should use the .prop() function. $("input").prop('disabled', true); $("input").prop('disabled', false); jQuery 1.5 and below The .prop() function doesn't exist, but .attr() does similar: Set the di

使用jQuery禁用/启用输入?

$input.disabled = true; 要么 $input.disabled = "disabled"; 标准的方式是什么? 而且,相反,您如何启用禁用的输入? jQuery 1.6+ 要更改disabled属性,您应该使用.prop()函数。 $("input").prop('disabled', true); $("input").prop('disabled', false); jQuery 1.5及以下版本 .prop()函数不存在,但.attr()作用类似: 设置禁用的属性。 $("input").attr('disabled','disabled'); 要再次启用,正确的方法是使

Add table row in jQuery

What is the best method in jQuery to add an additional row to a table as the last row? Is this acceptable? $('#myTable').append('<tr><td>my data</td><td>more data</td></tr>'); Are there limitations to what you can add to a table like this (such as inputs, selects, number of rows)? The approach you suggest is not guaranteed to give you the result you'r

在jQuery中添加表格行

jQuery中最好的方法是将最后一行添加到表中作为最后一行? 这可以接受吗? $('#myTable').append('<tr><td>my data</td><td>more data</td></tr>'); 你可以添加到像这样的表中有什么限制(例如输入,选择,行数)? 你建议的方法不能保证给你你要找的结果 - 例如,如果你有一个tbody ,例如: <table id="myTable"> <tbody> <tr>...</tr> <tr&g

Is jquery a javascript library or framework?

Here, jquery is mentioned under framework category: http://en.wikipedia.org/wiki/Comparison_of_JavaScript_frameworks Is jquery a javascript library or framework? A library. According to the homepage, and which I agree with. A framework is something that usually forces a certain way of implementing a solution, whereas jQuery is just a tool to make implementing what you want to do easier.

是jQuery的JavaScript库或框架?

在这里,jquery在框架类中被提及:http://en.wikipedia.org/wiki/Comparison_of_JavaScript_frameworks 是jQuery的JavaScript库或框架? 图书馆。 根据主页,我同意。 框架通常会强制执行解决方案的某种方式,而jQuery只是一个让您更容易实现的工具。 jQuery:写少,多做,JavaScript 库 。 当然,这是一个JavaScript库。 但是关于是否构架,我只是认为它不是一个框架。 看看wikipedia定义的软件框架: 它是提供定

Detecting an undefined object property

检查JavaScript中的对象属性是否未定义的最佳方法是什么? Use: if (typeof something === "undefined") { alert("something is undefined"); } If an object variable which have some properties you can use same thing like this: if (typeof my_obj.someproperties === "undefined"){ console.log('the property is not available...'); // print into console } I believe there are a number of incorrect ans

检测未定义的对象属性

检查JavaScript中的对象属性是否未定义的最佳方法是什么? 使用: if (typeof something === "undefined") { alert("something is undefined"); } 如果一个具有一些属性的对象变量可以像这样使用相同的东西: if (typeof my_obj.someproperties === "undefined"){ console.log('the property is not available...'); // print into console } 我相信这个话题有很多不正确的答案。 与普遍的看法相反,“未定义” 不是

Get the current URL with JavaScript?

All I want is to get the website URL. Not the URL as taken from a link. On the page loading I need to be able to grab the full, current URL of the website and set it as a variable to do with as I please. Use: window.location.href As noted in the comments, the line below works, but it is bugged for Firefox. document.URL; See URL of type DOMString, readonly . URL Info Access JavaScript

使用JavaScript获取当前网址?

我想要的只是获取网站的网址。 不是从链接中获取的网址。 在页面加载时,我需要能够抓取网站的完整当前网址,并将其设置为可以随我使用的变量。 使用: window.location.href 正如评论中所指出的那样,下面的行可以工作,但是对于Firefox来说却是错误的。 document.URL; 请参阅只读DOMString类型的URL 。 URL信息访问 JavaScript为您提供了许多方法来检索和更改浏览器地址栏中显示的当前URL。 所有这些方法都使用L

Is it possible to use Digest

I have a simple question: Is it possible to use Digest-Authentication with a XMLHTTPRequest? If the answer is no, what's the technical reason? Or if it is possible - how can I do that? Thanks a lot … google has no good answer so far :-/ EDIT: Thanks for the answers. Modifying the header to match the digest authentication-scheme, after a nonce has been received, seems to be a solutio

是否可以使用摘要

我有一个简单的问题:是否可以使用Digest-Authentication和XMLHTTPRequest? 如果答案是否定的,技术原因是什么? 或者如果可能的话 - 我该怎么做? 非常感谢...到目前为止google没有好的答案: - / 编辑: 感谢您的答案。 在接收到随机数后,修改标题以匹配摘要认证方案似乎是一种解决方案。 但我真正想要的是我可以改变我目前的调用:xmlhttp.open(“GET”,url,false,username,password); 某事 就像xmlhttp

JavaScript post request like a form submit

I'm trying to direct a browser to a different page. If I wanted a GET request, I might say document.location.href = 'http://example.com/q=a'; But the resource I'm trying to access won't respond properly unless I use a POST request. If this were not dynamically generated, I might use the HTML <form action="http://example.com/" method="POST"> <input type="hidden" name="q

JavaScript提交请求,如表单提交

我正在尝试将浏览器指向其他页面。 如果我想要GET请求,我可能会说 document.location.href = 'http://example.com/q=a'; 但我试图访问的资源将不会正确响应,除非我使用POST请求。 如果这不是动态生成的,我可能会使用HTML <form action="http://example.com/" method="POST"> <input type="hidden" name="q" value="a"> </form> 然后我只需从DOM提交表单。 但是,我真的想要JavaScript代码,让我

Convert JavaScript String to be all lower case?

How can I convert a JavaScript string value to be in all lower case letters? Example: "Your Name" to "your name" var lowerCaseName = "Your Name".toLowerCase(); Use either toLowerCase or toLocaleLowerCase methods of the String object. The difference is that toLocaleLowerCase will take current locale of the user/host into account. As per § 15.5.4.17 of the ECMAScript Langu

转换JavaScript字符串为全部小写?

如何将JavaScript字符串值转换为全部小写字母? 例如:“你的名字”改为“你的名字” var lowerCaseName = "Your Name".toLowerCase(); 使用String对象的toLowerCase或toLocaleLowerCase方法。 区别在于toLocaleLowerCase会考虑用户/主机的当前语言环境。 根据ECMAScript语言规范(ECMA-262)的§15.5.4.17, toLocaleLowerCase ... ...与toLowerCase完全相同,只是其结果旨在为主机环境的当前语言环境提供正确的结果,而不是