blocks|key|5276927|text|是的，在你了解其中一个库之前，一定要先学习Javascript。这就是“先走后跑”的事情。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5276928|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Yes, definitely learn Javascript before you learn one of the libraries about. It's the whole walk-before-you-can-run thing.

blocks|key|3866279|text|确保将这些站点添加到您的书签：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3866280|Mozilla's+developer+site：这包含对Mozilla中Javascript+API的引用。这将帮助你确保你所写的代码是Firefox能够理解的。|offset|length|3866281|IE's+site+in+Microsoft+Developer+Network：IE也是如此。|3866282|W3's+reference+of+DOM+for+HTML：在今天的大多数web应用程序中，Javascript代码操作DOM，这是一个内部跟踪显示在屏幕上的对象(但您已经知道了，对吧?)这是对DOM的引用。它是语言中立的，这意味着它不针对Javascript，但这些方法也存在于Javascript中。|3866283|Douglas+Crockford'+site：当涉及到Javascript时，Doug+Crockford是男子汉。他的网页上的文章是必读的。因为Javascript具有闭包和一流的函数，所以他认为它更接近Lisp和Scheme，而不是其他语言。他教你如何用这些语言特性极大地改进你的代码。|3866284|Yahoo+Developer+network：您可能还想检查一下。不过，我不是这个网站的常客，所以我真的不能说太多。|3866285|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.mozilla.org/En|1|http://msdn.microsoft.com/en-us/ie/default.aspx|2|http://www.w3.org/TR/DOM-Level-2-HTML/html.html|3|http://javascript.crockford.com/|4|http://developer.yahoo.com/^0|0|0|O|0|0|0|14|1|0|0|U|2|0|0|N|3|0|0|N|4|0^^$0|@$1|2|3|4|5|6|7|13|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|14|8|@]|9|@$D|15|E|16|1|17]]|A|$]]|$1|F|3|G|5|6|7|18|8|@]|9|@$D|19|E|1A|1|1B]]|A|$]]|$1|H|3|I|5|6|7|1C|8|@]|9|@$D|1D|E|1E|1|1F]]|A|$]]|$1|J|3|K|5|6|7|1G|8|@]|9|@$D|1H|E|1I|1|1J]]|A|$]]|$1|L|3|M|5|6|7|1K|8|@]|9|@$D|1L|E|1M|1|1N]]|A|$]]|$1|N|3|-4|5|6|7|1O|8|@]|9|@]|A|$]]]|O|$P|$5|Q|R|S|A|$T|U]]|V|$5|Q|R|S|A|$T|W]]|X|$5|Q|R|S|A|$T|Y]]|Z|$5|Q|R|S|A|$T|10]]|11|$5|Q|R|S|A|$T|12]]]]

Make sure you add these sites to your bookmarks:

<a href="http://developer.mozilla.org/En" rel="noreferrer">Mozilla's developer site</a>: This contains the reference to the Javascript API in Mozilla. This will help you make sure you're writing code that Firefox understands.

<a href="http://msdn.microsoft.com/en-us/ie/default.aspx" rel="noreferrer">IE's site in Microsoft Developer Network</a>: The same, for IE.

<a href="http://www.w3.org/TR/DOM-Level-2-HTML/html.html" rel="noreferrer">W3's reference of DOM for HTML</a>: In most web applications today, the Javascript code manipulates the DOM, which is an internal keeping track of the objects displayed on screen (but you already knew that, right ?) This is the reference to the DOM API. It is language neutral, which means it does not target Javascript, but these methods exist in Javascript too.

<a href="http://javascript.crockford.com/" rel="noreferrer">Douglas Crockford' site</a>: Doug Crockford is THE MAN when it comes down to Javascript. The articles in his page are a must read. Because Javascript has closures and first-class functions, he believes it is closer to Lisp and Scheme than to other languages. And he teaches you how to greatly improve your code with these language features.

<a href="http://developer.yahoo.com/" rel="noreferrer">Yahoo Developer network</a>: You may also want to check this. I'm not a regular visitor to this site, though, so I can't really say much about it.

blocks|key|3020954|text|是的，如果你正在做web开发，你绝对应该学习JavaScript。我强烈推荐Doug+Crockford的JavaScript:+The+Good+Parts。而且，JQuery是一个很好用的框架(这个站点使用它)+--这在某种程度上取决于你想要做什么--+YUI和ExtJS也很好。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3020955|entityMap|0|LINK|mutability|MUTABLE|url|https://rads.stackoverflow.com/amzn/click/com/0596517742^0|1H|Q|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Yes, absolutely you should learn JavaScript if you are doing web development. I highly recommend <a href="https://rads.stackoverflow.com/amzn/click/com/0596517742" rel="noreferrer" rel="nofollow noreferrer">JavaScript: The Good Parts</a>, by Doug Crockford. And, JQuery is a great framework to use (this site uses it) -- it kind of depends on what you are trying to do -- YUI and ExtJS are also very nice.

blocks|key|766501|text|The+answer+is+simple.|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|766502|entityMap|0|LINK|mutability|MUTABLE|url|http://shouldilearnjavascript.com/^0|0|L|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

<a href="http://shouldilearnjavascript.com" rel="noreferrer">The answer is simple.</a>

blocks|key|766397|text|毫不费力是的。谷歌在V8+JS+engine+for+Chrome上大做文章是有原因的，为什么Mozilla在火狐上开发TraceMonkey，为什么Webkit已经在Squirrelfish上工作了一段时间(现在是Squirrelfish+extreme)。这是因为JS变得越来越受欢迎。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|766398|entityMap|0|LINK|mutability|MUTABLE|url|http://searchsoa.techtarget.com/news/article/0,289142,sid26_gci1328625,00.html|1|http://arstechnica.com/news.ars/post/20080822-firefox-to-get-massive-javascript-performance-boost.html|2|http://webkit.org/blog/214/introducing-squirrelfish-extreme/^0|A|N|0|1O|B|1|2C|C|2|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]|$A|T|B|U|1|V]|$A|W|B|X|1|Y]]|C|$]]|$1|D|3|-4|5|6|7|Z|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]|N|$5|G|H|I|C|$J|O]]]]

Hands down yes. There's a reason that Google have made such a big fuss about the <a href="http://searchsoa.techtarget.com/news/article/0,289142,sid26_gci1328625,00.html" rel="nofollow noreferrer">V8 JS engine for Chrome</a>, why Mozilla are working on <a href="http://arstechnica.com/news.ars/post/20080822-firefox-to-get-massive-javascript-performance-boost.html" rel="nofollow noreferrer">TraceMonkey</a> for Firefox and why Webkit have been working on <a href="http://webkit.org/blog/214/introducing-squirrelfish-extreme/" rel="nofollow noreferrer">Squirrelfish</a> for a while (now Squirrelfish extreme). It's because JS is becoming more popular by the day.

blocks|key|3021196|text|Javascript是一种花几个小时学习就能教会你99%25真正使用的语言。我可以想象你正在学习javascript的时候，你现在知道的已经足够多了，现在只需要学习一个或多个框架即可。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3021197|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Javascript is one of those languages that spending a few hours learning will probably teach you 99% of what you will ever really use. I would imagine you are at the point in your learning of javascript that you know more than enough now and just learn one or more of the frameworks now.

blocks|key|3021366|text|我建议先复习一下你的非框架javascript。刷新/学习dom操作等的基本概念。就像在学习如何使用标准模板库之前，先学习如何在C%2B%2B中构建链表、堆栈或队列。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3021367|除了直接温习javascript之外，进入一个不太抽象和改变事物工作方式的框架可能会更好，比如Prototype。使用它编写代码的方式与直接使用javascript编写代码的方式非常相似。通读原型代码，学习如何创建类，并做一些花哨的事情。根据经验，我可以说通过Prototype.js阅读帮助我学到了很多。|3021368|在胡乱摆弄了一下之后，我会说去jQuery。如果jQuery没有真正改变你编写代码的方式，我会说先试一试，但对于想要流利使用JS的人来说，学习如何构建类和js继承等可能是非常重要的一课。|3021369|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

I would recommend brushing up on your non-frameworked javascript first. Refreshing/learning basic concepts of dom manipulation and what not. Like learning how to build a linked list, stack or queue in C++ before learning how to use the STL (standard template libraries).

In addition to brushing up on straight javascript, it might be good to get into a framework that doesn't abstract and change the way things work so much, for instance Prototype. You code with it very much the same way you code with straight javascript. Read through the Prototype code, learn how to make classes, and do some fancy stuff. From experience, I can say reading through the Prototype.js helped me learn alot.

After messing around a bit, then I'd say go for jQuery. If jQuery didn't, literally, change the way you write code I'd say go for it first, but learning how to build classes and js inheritance and what not can be a very important lesson for someone who wants to become fluent in JS.

blocks|key|766466|text|任何web应用程序开发人员都推荐学习javascript。为什么？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|766467|766468|您将更好地了解与开发web应用程序相关的可能性、限制和危险|unordered-list-item|offset|length|style|BOLD|766469|如果您正在开发具有user+interface.|766470|的web应用程序，则会对您的职业生涯大有裨益|766471|然而，学习javascript通常是一种编程语言和另一种编程语言之间的权衡。您应该考虑javascript是否与您的职业或项目相关。|766472|entityMap^0|0|0|K|9|0|9|E|0|0|Z|2|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|S|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|T|8|@$F|U|G|V|H|I]]|9|@]|A|$]]|$1|J|3|K|5|E|7|W|8|@$F|X|G|Y|H|I]]|9|@]|A|$]]|$1|L|3|M|5|6|7|Z|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|10|8|@$F|11|G|12|H|I]]|9|@]|A|$]]|$1|P|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|Q|$]]

Learning javascript is recommended for any web application developer. Why?

<ul>
<li>You will better understand the possibilities, limitations and dangers related to developing a web application</li>
<li>It is a boost for your career, if you are working on a web application that has a user interface.</li>
</ul>

However, learning javascript is usually a trade-off between a programming language and another. You should consider whether javascript is relevant for your career or project.

blocks|key|5276987|text|除非你真的想要进入javascript，否则我认为你最好学习足够的JS来利用一个经过验证和测试的javascript库。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5276988|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Unless you want to really get into javascript, I think you'd be better off learning enough JS to leverage one of the tried and tested javascript libraries out there.

blocks|key|3021157|text|JavaScript的一个优点是它与主流语言如C#、VB.NET或Java有很大的不同。学习它，特别是如果你有机会使用它，会让你对编程有另一种见解，这总是很好的。我认为这是值得学习的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3021158|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

One thing nice about JavaScript is that it is quite different from mainstream languages such as C#, VB.NET or Java. Learning it, especially if you have occasions to use it, will give you another insight on programming, and that's always good. I think it's worth learning it.

blocks|key|5277503|text|如果你正在做web开发，那么在你职业生涯的某一时刻，你会因为许多原因中的任何一种而接触到Javascript或ECMAScript。至少你应该了解足够多的Javascript，以便能够验证用户输入；然而，web正在朝着使用更多Ajax的方向发展，所以你也应该了解足够的Javascript，以便正确利用现有的主要库之一，如jQuery。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|5277504|正如其他一些用户所指出的那样，您可以在一天或几个下午的时间内每天学习Javascript所需的大部分内容。如果你想通过Javascript获得更高级的东西，那么你将不得不投入更多的时间来学习这门语言，但很有可能的是，除非你找到了这种类型的工作，否则你不会遇到一些预先存在的库不存在的东西。|5277505|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/ECMAScript|1|http://jquery.com/^0|1J|A|0|4H|6|1|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]|$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|X|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]|N|$5|I|J|K|C|$L|O]]]]

If you are doing web development then at some point you are going to get exposed to Javascript or <a href="http://en.wikipedia.org/wiki/ECMAScript" rel="nofollow noreferrer">ECMAScript</a> at some point in your career for any one of a number of reasons. At a minimum you should know enough Javascript to be able to be able to validate user input; however, the web is moving in the direction of using more an more Ajax so you should also know enough Javascript to properly leverage one of the major libraries out there such as <a href="http://jquery.com/" rel="nofollow noreferrer">jQuery</a>.

As some of the other users have noted, you can learn most of what you need of Javascript on a day to day basis in a single day or a couple of afternoons. If you want to get more advanced with Javascript then you are going to have to invest much more time in learning the language but odds are that unless you seek out this type of work that you are not going to encounter something that a preexisting library doesn't already exist for.

blocks|key|3866364|text|如果你只想做一些简单的UI效果之类的事情，我建议你只需要选择一个库就可以了！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3866365|使用库消除了所有有缺陷的JavaScript实现，并为您提供了一个在所有浏览器上都相同的应用程序接口。如果你和其他人一起工作，这也是实现代码标准和最佳实践的好方法。|3866366|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

If all you want is to do some simple UI-effects and the like, I suggest you just pick a library and go for it! 

Using libraries eliminates all the flawed implementations of JavaScript and provides you with an API which is the same across all browsers. And if you're working together with others it is also a great way of implementing code-standards and best practices.

blocks|key|3021018|text|学习第二门编程语言总是很好的。听起来，JavaScript是你使用的一种语言，对它也有实际的用处。作为一名web开发人员，我在一篇评论中被推荐至少学习基本的JavaScript。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3021019|像jQuery这样的库对于当今的web开发来说是必不可少的，所以你也可以学习它。|3021020|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Learning a second programming language is always good. 
By the sound of it, JavaScript is a language that you use, to it will be of practical use too. As a web dev, it has been recommended to me in a review that i learn at least basic JavaScript.

A library such as jQuery is essential for web development thse days, so you could learn that too.

blocks|key|5277165|text|我不认为很多刻意的学习是有意义的(但当然你需要一些基础知识)，但我也认为经过几年的web开发，你会变得非常精通这门语言:)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5277166|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I don't think a lot of deliberate learning makes sense (but of course you need some basic knowledge), but I also think after some years of web development you'll become pretty proficient in the language anyway :)

blocks|key|3021258|text|如果你是webdev，那么是的，你应该精通Javascript。Javascript是使web应用程序与桌面应用程序一样具有交互性的主要部分。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3021259|尽管如此，学习使用跨浏览器兼容库之一，如JQuery，Prototype等。我们不需要再有任何使用Javascript创建的单一浏览器crud，仅仅因为任何真正的男人/女人都有自己的crud。|3021260|在Javascript中需要学习的几件事:+1.基本语法2.函数声明的各种风格。3.传递函数以及如何使用传入的函数。|3021261|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

If you are a webdev then yes, you should be proficient with Javascript. Javascript is a major part of making web apps as interactive as desktop apps. 

With that being said, learn to use one of the cross-browser compatible libraries like JQuery, Prototype, etc. We do not need to have any more single browser crud created using Javascript, just because any real man/woman rolls their own.

A few things to learn in Javascript:
1. Basic syntax
2. The various flavours of function declaration. 
3. Passing functions around and how to use passed in functions.

blocks|key|3021302|text|我推荐Jeremy+Keith的书：DOM+Scripting和Bulletproof+Ajax。当你对JS变得更加流利之后，我会推荐一个JS库(我使用jQuery，但这并不重要)。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3021303|学习JS很重要。如果没有对框架工作原理的正确理解，就不能使用框架。这是在倒退。|3021304|entityMap|0|LINK|mutability|MUTABLE|url|https://rads.stackoverflow.com/amzn/click/com/1590595335|1|http://bulletproofajax.com/^0|I|D|0|W|G|1|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]|$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|X|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]|N|$5|I|J|K|C|$L|O]]]]

I recommend Jeremy Keith's books: <a href="https://rads.stackoverflow.com/amzn/click/com/1590595335" rel="nofollow noreferrer" rel="nofollow noreferrer">DOM Scripting</a> and <a href="http://bulletproofajax.com/" rel="nofollow noreferrer">Bulletproof Ajax</a>. After you become more fluent in JS I would recommend a JS library(I use jQuery, but that is not important).

JS is important to learn. You cannot use a framework without the proper understanding of how it works. That is doing things backwards.

blocks|key|5277555|text|我认为你应该有一个良好的语言规范和DOM+(文档对象模型)的基础。这意味着，你应该知道如何查找/创建“页面对象”和编辑属性。你还应该有一个“面向对象”的javascript技术的想法，这是很多框架的起点。如果你不使用特定的框架，你不需要学习它。简单的记住通用基础的概念！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5277556|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

i thing you should have a good knoloedge base of language specification and DOM (Document Object Model). it means,you shoud know how find/create "page object" an edit properties. Also you should have an idea of "object oriented" javascript tecniques, which the starting point of a lot of framework. you don't need learn specific framework if you don't use it. simple keep in mind generic base concept!

blocks|key|5277833|text|我将采用大多数人提出的相反答案。如今，作为开发人员学习javascript几乎是毫无意义的。这种语言与java/C#非常相似，所以它的语法和语义不应该让你迷失。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5277834|你应该学习的是jQuery。|5277835|当你使用jQuery的时候，你将会从javascript中获得你所需要的最常见的东西。|5277836|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

I'll go with the opposite answer most are putting out there. Learning javascript as a developer these days is almost pointless. The language is similar enough to java/C# that it's syntax and semantics shouldn't be lost on you.

What you should learn is jQuery.

As you use jQuery you'll pick up the most common things you'll ever need from javascript anyway.

blocks|key|3866464|text|如果你以任何方式参与到Web中，那么答案是“是的，总是”。也许一个嵌入式或系统的程序员没有JavaScript也可以，但webdev就不行了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3866465|大多数库都是为了减轻与众多浏览器交互的痛苦而设计的。它们不会抽象出核心的JavaScript功能。|3866466|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

If you're involved with the Web in anyway then the answer is "Yes, always". Maybe an embedded or system's programmer could get by without JavaScript, but not a webdev.

Most of the libraries are designed to alleviate some of the pain of interacting with a multitude of browsers. They will not abstract away core JavaScript functionality.

blocks|key|5277912|text|是的，你应该学习JavaScript。你迟早会用到它的！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5277913|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Yes, you should learn JavaScript. Sooner or later you will need to use it!

I am a .NET webdev using ASP.NET, C# etc... I "learned" javascript in college 5+ years ago and can do basic jobs with it. But I wonder if it is useful to become proficient in it.

Why should I learn Javascript?
Is it more advantageous then learning JQuery or a different <a href="https://stackoverflow.com/questions/913/what-javascript-library-would-you-choose-for-a-new-project-and-why">library</a>?

Should I learn/become proficient in Javascript?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我是一个使用ASP.NET，C#等的.NET网络开发人员。几年前，我在大学5+里“学习”了javascript，并能用它做一些基本的工作。但我想知道精通它是否有用。我为什么要学习Javascript？与学习JQuery或学习不同的相比，哪个更有优势

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