Proxy object cannot be added to DOM (traps doesn't trigger either)

I am trying to make a Proxy object of Image to trap properties but even with an empty handler I get an error message. TypeError: Argument 1 of Node.appendChild does not implement interface Node. The proxy object is suppose to act as the target object so this baffles me a little. As far as I understand you should be able to do this with DOM nodes as well (?). Also : I cannot start loading t

代理对象不能添加到DOM(陷阱不会触发)

我试图让一个Proxy对象的Image陷阱属性,但即使与一个空的处理程序,我收到一条错误消息。 TypeError:Node.appendChild的参数1没有实现接口节点。 代理对象被认为是目标对象,所以这让我很困惑。 据我所知,你应该可以做到这一点与DOM节点(?)。 另外 :我无法开始加载图像,并在设置src属性时触发onload处理程序。 我应该如何使用代理服务器,以便“接管”例如“src”属性,否则就像普通图像对象那样工作? 我的代码

Regular expression which matches a pattern, or is an empty string

I have the following Regular Expression which matches an email address format: ^[w.-]+@([w-]+.)+[a-zA-Z]+$ This is used for validation with a form using JavaScript. However, this is an optional field. Therefore how can I change this regex to match an email address format, or an empty string? From my limited regex knowledge, I think b matches an empty string, and | means "Or", so

正则表达式匹配模式,或者是空字符串

我有以下正则表达式匹配电子邮件地址格式: ^[w.-]+@([w-]+.)+[a-zA-Z]+$ 这用于使用JavaScript对表单进行验证。 但是,这是一个可选字段。 因此,如何更改此正则表达式以匹配电子邮件地址格式或空字符串? 从我有限的正则表达式知识中,我认为b匹配一个空字符串,并| 意思是“或”,所以我试图做到以下,但它没有奏效: ^[w.-]+@([w-]+.)+[a-zA-Z]+$|b 要匹配pattern或空字符串,请使用 ^$|pattern 说明 ^和$分别是

Meteor session cookie & meteor

According to the docs , Meteor doesn't use session cookies. However, what's the meteor_login_token cookie used for then? It looks to me like a session cookie, created after the user successfully signs in, and passed then to every request made to the server. Meteor definitely doesn't use cookies. Do you have any additional packages with your app that could add this cookie? For

流星会话cookie和流星

根据文档,Meteor不使用会话cookie。 但是,当时使用的meteor_login_token cookie是什么? 它看起来像一个会话cookie,在用户成功登录后创建,然后传递给服务器的每个请求。 流星绝对不使用cookies。 你有任何附加的软件包可以添加这个cookie吗? 例如,快速渲染能够通过使用cookie发送相同的登录令牌来获取与用户相关的数据。 如果我们看看他们的代码,他们确实有一个函数设置名为meteor_login_token的cookie。 funct

What can we assume is an invalid email address?

I am attempting to validate email addresses, however I want the most lenient validation possible as I intend to back this up by sending the user a validation email (I am aware this gets asked a lot but the other questions are focused on being as strict as possible whereas I am attempting to identify the most lenient checks possible). I still think it's important to have some level of valida

我们可以假设一个无效的电子邮件地址?

我试图验证电子邮件地址,但是我想要最宽松的验证,因为我打算通过向用户发送验证电子邮件来支持这个验证邮件(我知道这会得到很多问题,但其他问题都集中在严格可能,而我试图确定可能的最宽松的检查)。 我仍然认为有一定程度的验证是很重要的,可以删除那些不可能是电子邮件地址的东西......我不希望"this is not @n email. fool"坐在我的数据库冒充成为冒充电子邮件。 虽然我很高兴拥有"this.is.not.an.em

Best practices for email address validation (including the + in gmail addresses)

I know there are a lot of questions on here about email validation and specific RegEx's. I'd like to know what the best practices are for validating emails with respect to having the username+anythingelse@gmail.com trick (details here). My current RegExp for JavaScript validation is as follows, but it doesn't support the extra + in the handle: /^([a-zA-Z0-9_.-])+@(([a-zA-Z0-9-])+.)

电子邮件地址验证的最佳做法(包括Gmail中的地址)

我知道这里有很多关于电子邮件验证和特定RegEx的问题。 我想知道什么是验证电子邮件的最佳做法是否有关于使用username+anythingelse@gmail.com技巧(详情在此处)。 我目前用于JavaScript验证的RegExp如下,但它不支持句柄中的额外+ : /^([a-zA-Z0-9_.-])+@(([a-zA-Z0-9-])+.)+([a-zA-Z0-9]{2,4})+$/ 有没有其他服务支持额外的+ ? 我应该允许在地址中加一个+还是应该将RegEx更改为仅允许将gmail.com或googlemail.com作为

Check whether a string matches a regex in JS

I want to use JavaScript (can be with jQuery) to do some client-side validation to check whether a string matches the regex: ^([a-z0-9]{5,})$ Ideally it would be an expression that returned true or false. I'm a JavaScript newbie, does match() do what I need? It seems to check whether part of a string matches a regex, not the whole thing. Use regex.test() if all you want is a boolean re

检查一个字符串是否与JS中的正则表达式匹配

我想使用JavaScript(可以与jQuery)做一些客户端验证,以检查字符串是否与正则表达式匹配: ^([a-z0-9]{5,})$ 理想情况下,这将是一个表达式,返回true或false。 我是一个JavaScript新手,不match()做我需要什么? 它似乎检查一部分字符串是否匹配正则表达式,而不是整个事物。 使用regex.test()如果你想要的只是一个布尔结果: /^([a-z0-9]{5,})$/.test('abc1'); // false /^([a-z0-9]{5,})$/.test('abc12'); // t

style email address validation

I need a regular expression that will accept well-formed emails in several formats (see below) that will be input in a comma-separated list. I have the basic email address validation regex, ^[wd._%+-]+@(?:[wd-]+.)+(w{2,})(,|$) which can handle test cases A and B , but not the others. I also tried ^(<)?[wd._%+-]+@(?:[wd-]+.)+(w{2,})(>)?(,|$) which was able to handle A , B , and C , bu

样式电子邮件地址验证

我需要一个正则表达式,它将以多种格式接受格式正确的电子邮件(见下文),这些电子邮件将以逗号分隔的列表形式输入。 我有基本的电子邮件地址验证正则表达式, ^[wd._%+-]+@(?:[wd-]+.)+(w{2,})(,|$) 它可以处理测试用例A和B ,但不能处理其他测试用例。 我也试过了 ^(<)?[wd._%+-]+@(?:[wd-]+.)+(w{2,})(>)?(,|$) 它能够处理A , B和C ,但只验证每个测试用例D和E中的第一个电子邮件地址。 我甚至没有开始测试格

Why output of my Javascript regex is inconsistent?

This question already has an answer here: Why does a RegExp with global flag give wrong results? 5 answers You're using a global ( g ) flag. According to MDN: As with exec() (or in combination with it), test() called multiple times on the same global regular expression instance will advance past the previous match. You can get around this by setting lastIndex . Because of the g m

为什么我的Javascript正则表达式输出不一致?

这个问题在这里已经有了答案: 为什么带有全局标志的RegExp会给出错误的结果? 5个答案 您正在使用全球( g )国旗。 根据MDN: 与exec() (或与它结合)一样,在同一个全局正则表达式实例上多次调用的test()将超过先前的匹配。 你可以通过设置lastIndex来解决这个问题。 因为你用于test的g修饰符。 MDN: 在同一个全局正则表达式实例上调用多次的test()将超过先前的匹配。 在每个解决此问题后使用regex.last

RegEx Not Recognizing Invalid Email

I am trying to validate an email address for a form element. I am familiar with regular expressions so I believe that part is correct, but I want it to display an alert when the email entered is invalid. My problem is that the form submits even when I enter an invalid email address instead of popping up the alert window. RegEx function in javascript: function validateEmail() {

RegEx无法识别无效的电子邮件

我正在尝试验证表单元素的电子邮件地址。 我熟悉正则表达式,所以我相信这部分是正确的,但我希望它在输入的电子邮件无效时显示警报。 我的问题是,即使我输入了无效的电子邮件地址,而不是弹出警报窗口,表单也会提交。 JavaScript中的RegEx函数: function validateEmail() { var myEmailRegEx = /w+@w+.[a-z]|[A-Z]|d|.|-{2,}/ if(myEmailRegEx.test(document.getElementBy

JavaScript Regular Expression Email Validation

This question already has an answer here: How to validate an email address in JavaScript? 69 answers How to validate an email address using a regular expression? 74 answers If you define your regular expression as a string then all backslashes need to be escaped, so instead of 'w' you should have '\w'. Alternatively, define it as a regular expression: var pattern = /^w+

JavaScript正则表达式电子邮件验证

这个问题在这里已经有了答案: 如何验证JavaScript中的电子邮件地址? 69个答案 如何使用正则表达式验证电子邮件地址? 74个答案 如果将正则表达式定义为字符串,则所有反斜杠都需要转义,所以不要使用' w',而应该使用'\ w'。 或者,将其定义为正则表达式: var pattern = /^w+@[a-zA-Z_]+?.[a-zA-Z]{2,3}$/; 顺便说一句,请不要验证客户端的电子邮件地址。 无论如何,你的正则表达式太简单了,