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Recently I started reading about Smalltalk and its way of development and I was quite impressed. I was wondering whether there is some sort of library that makes possible the same way of development in JavaScript. I found some libraries but they just reload the page or restarts a running node.js server. I'm interested in both client side and server side JavaScript libraries. Amber Smalltalk is nice but I'm looking for a way to do the same in JS.
Edit: I'm looking for some sort of live editing of objects and prototypes and saving the changes to a file, or changing the contents of a file and the added methods are propagated to a running page or server. All this placed in an IDE similar to that of Pharo. What I found is that Meteor and Brackets support some kind of this functionality (live editing going from a source file to a browser).
You should have a look at "Lively", a project providing a Smalltalk-like environment in JavaScript:
http://lively-web.org/
It was initiated by Dan Ingalls, implementor of the original and later Smalltalks.
You can find an earlier version and some additional resources at http://lively-kernel.org/
There is also morphic.js, by Jens Mönig, which is the engine powering the Snap! graphical language/environment:
https://github.com/jmoenig/morphic.js
It is not client+server, but it is really easily portable to NodeJS.
Checkout LiveReload.js. Allows you to write javascript and changes are updated in realtime without refreshing the page using the LiveReload protocol.
Take a look at SqueakJS:
SqueakJS executes Squeak in a web page without a plugin. It is a fully
capable virtual machine implemented in pure JavaScript running
unmodified Squeak images. Squeak is a modern implementation of
Smalltalk, the original dynamic object-oriented programming
environment. It runs bit-identically on virtually any platform, and
now in the web browser, too.
https://bertfreudenberg.github.io/SqueakJS/
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I have inherited a web application to maintain. The application entails hundreds of thousands of lines of Javascript across hundreds of libraries that get loaded/unloaded at run time. I need to add a feature to the site to let a user know if his/her browser doesn't support the minimum Javascript version required to run the site, which, in turn, requires me to analyze all the Javascript in the site in order to know the minimum required version. The libraries were written/added as-needed over the years, using whatever features Javascript supported at the time, so some libraries can work with older Javascript than others.
What offline software or utility can I use to analyze all the Javascript in the project and determine the minimum Javascript version that is found? By "offline" I mean not uploading the project to a web-based analyzer or otherwise transferring any part of the project to a third party for analyzation. An open source tool would be preferred, but I would pay for a commercial tool out-of-pocket if absolutely necessary and not more than $100.
I mean, if you don’t want to use great services provided by browserstack or browserling, then your only three options are:
Either use a virtual machine and install every web browser from the first version up
Or if you have chrome, you can open up the chrome dev tools and see if it says anything api is deprecated
Or you could use w3schools as a reference to which api’s are supported and modify the native api in such a way so that you can see which api’s are being called
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I am working on a project where we are running our web server on an embedded system so I have memory constraints but is there a way for me to build a Single Page Application on this web server ? If, yes then do we have a javascript framework that I can work with or am I stuck with basic javascript itself ?
And there will be real time data sent and received from the server.
Single-page applications can have very little logic on the server-side, since the entire application is JavaScript that is run on the client. The only server-side logic you will absolutely need will be a small server that sends the files to the client (which would the the web browser in which you're accessing the site).
As mentioned before by Gerton, you can comfortably build a SPA with Angular. You can also look at the other two of the most used frameworks currently: react.js and vue.js.
Have fun!
I work on multiple embedded systems and would recommend re-architecting your solution. The whole web server to UI concept for embedded systems is the old way of doing things and it's not the fastest or the most efficient for generating real time data. You should be looking into QT for Linux-based systems or Xamarin for Windows based systems.
If you already have the back-end data model finished, it's easy to create a new project in one of these applications and build a UI over the top. Trust me on this one. It'll save you a ton of hassle and will increase the performance of your embedded system.
If you implement a web server, I would recommend doing it to expose data to a cloud application or as part of a distributed architecture, not part of feeding data to your local UI.
Angular Seems to support your question quite nicely, it's a single page application framework
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I am a Java developer and I know Rest APIs. But what if I want to make great webpages using website building tools like WordPress and then with Rest API I can connect with my backend server.
Will that be a viable solution or I should look for something else?
On a very basic research I got to know that wordpress runs on PHP, but I am not looking to learn PHP at this point of time.
I am looking for the below things :
1 - Some tool which helps in building rich HTML page, that has drag
and drop options.
2 - I am thinking to use Spring boot for
configuring Rest API.
Basically I am looking for some suggestions in building good websites having knowledge of Java. (And yes I still need to learn Ajax and Javascript.)
I might be absolutely wrong on what I am looking, but any suggestion will be of great help.
A REST client (in your case a website) doesn't care what programming languages/technologies were used to create the server. You can have a server hosting a WordPress website (PHP) and have another server for your REST API created in Java or whatever other language you might want to use. If you want to make REST calls from your WordPress server (e.g. for server-side rendering), you'll need to use PHP. The more likely scenario is that the website makes REST requests from the browser, in which case you'll need to use JavaScript.
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I would appreciate documentation and/or tutorial links to help me with the following.
I maintain a traditional web application, implemented in html, javascript, and Perl. The web site uses a third-party open source library that implements buttons. If you wave the mouse over the buttons, they indent and put up a tool tip. The site looks very professional.
I've implemented a very simplistic Django application. It does the job, but uses hyperlinks. I'd like to dress up my Django application, and make it look more professional `a la the traditional web site.
I tried this before with some simple javascript, checking fields to see if they contained a valid answer, and this did not work. As it was explained to me, it had to do with the server side processing.
Given there is no javascript already, I have no problem using a different library (JQuery) than my traditional web site.
I have no problem if someone thinks implement in html, javascript, and php, because I've got one of those applications, too. However, I'd like to continue with Django, if possible.
Javascript and Django are independent. I use Django with jQuery UI to get nice buttons but you could use any javascript library, including the one you are using in the original site.
Your existing site is either using hyperlinks, the same as Django, that are modified in the browser to be buttons (this is what jQuery UI can do as well). This is the simple case you just need to put your javascript in the templates.
If it is a complete ajax application you'll need to write Django web services to handle those.
Your best bet is to find a tutorial for the particular javascript library you are using because Django is pretty much javascript agnostic. For instance the jQuery getting started page is a good place to start.
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I've done a bunch of web development with JSP/J2EE and some ASP.NET. Nevertheless, I still feel like I'm catching up with the web 2.0 stuff that relies heavily on JavaScript.
I have two questions:
I'm looking for great samples of web applications to learn development techniques. I prefer to look at real-world examples (i.e. something open source). I'm open to learning from any great code, regardless of language used on server side. The kind of example webapps I'm looking for are ones that clean and not too complex, but also not too trivial. I have checked out some code from google code project hosting, but I don't have time to download and look at hundreds of different projects, so I'm looking for suggestions.
Second question: I know Ruby on Rails was an innovative framework (which I've never used, but I'm familiar with it and I've played around with Grails, a similar framework but more Java-like). So rails is now a few years old. What are the major things we learned since the introduction of Rails and what does the next generation of web framework look like?
I knew that saving this tweet from Ruby News would come in handy.
Take a look at Chris Lowis's post: Open-source rails apps to study and learn from.
about the first question, I can suggest you TeamBox, very similar to Basecamp, but it's open source, with an avaiable repository on github. it's written in rails.
for the second question: for sure I learnt about MVC approach (I re-applied same philosophy to PHP in some works). the next generation frameworks are using even more abstractions and layers. for example using ORM libraries for different databases (you save time writing SQL queries, you can use same API for different databases, even for the new NoSQL storages).
I suggest you to look for Redis, CouchDB and MongoDB databases. they are different each other about approach and data-organization, but they are becoming very useful for complicated web-apps