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This episode features Moving from Node.js to .NET and Raygun.io with John-Daniel Trask. John-Daniel is the Co-founder and CEO of Raygun, a software intelligence platform for web and mobile. He's been programming for many years, and is originally from New Zealand. Tune in and learn what prompted them to move to the .NET framework!

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JSJ 267 Node 8 with Mikeal Rogers, Arunesh Chandra, and Anna Henningsen

By devchat.tv
Published On :: Tue, 27 Jun 2017 06:00:00 -0400

JSJ 267 Node 8 with Mikeal Rogers, Arunesh Chandra, and Anna Henningsen

On today’s episode of JavaScript Jabber we have panelists Joe Eames, AJ O’Neil, Amiee Knight and Charles Max Wood and we are talking about Node 8. To help us we have special guests Mikeal Rodgers, Arunesh Chandra, and Anna Henningsen. It’s going to be a great show. Tune in.

[1:56] Is Node 8 just an update or is there more?

More than just an update
Two main points:
Improved Prana support
Native API
Native APIs are helpful for Native Add-ons. For both the consumer and the developer side.
Prior to update these Node Native modules ran in C++ and bound to specific to Node 8 APIs.
Causes these modules to be updated or reconciled every time these modules are rereleased.
Creates burden for module maintainers.
Creates friction in upgrading Node versions in production departments.
If you have a deployment depending on a certain Native module, some of the modules may not get updated in time when updating your Node versions. Keeping people from updating Node.
Creates compatibility issues with Node users not using Node 8
Experimental support for a Native layer in Node 8 to eliminate these issues as much as possible.
Important milestone for the module ecosystem.
You can write extensions for Node in C++ and it decouples V8 so you can use something else on the front.
Modules takes dependency on V8 API specific to a particular version. So if V8 changes your module will be extracted from that.
As a side benefit, you can have another VM to take advantage of that.
Major version upgrades mean updating Native modules and usually some of those modules haven’t updated to the newest version of Node and be complicated.
Deep dependency wise, about 30% depends on a Native module somewhere
In the future, with the Native API, you’ll be able to update Node without breaking modules.

[5:51] What kind of work went into this?

Most of the work was in C++
First thing that was done was, they looked at the top dependent Native modules in the ecosystem.
Looked for what kind of V8 exposure they had and cataloged it
Looked at how these APIs and what their purposes were
Looked for a way to extract them so that they are part of Node Core
Created neutral APIs, now part of the Node core.
All C APIs
Also has a C++ wrapper to improves usability of the API.

[7:17] What’s an example of what you can do with these APIs?

Native modules allows for tighter integration and better module performance
Specific APIs that you can use in V8 that isn’t available through JavaScript
If you have a C++ variable code and you want to expose a variable into JavaScript, that is V8 API note a Node 8 API
Having it bound directly to the VM was something they wanted for a long time
Google controls V8 and they bind to V8
Created a better relationship with Google starting in IOJS
Also worked with Microsoft with their Node Shocker work.
Same with SpiderMonkey
SpiderNode is in the works

[9:23] Have you guys done any testing for performance?

Some. There is a performance working group.
There is a need to stay on top of V8
V8 team has focused on new language features
Many features have been added over the years
Many didn’t come in optimized
The performance profile has changed with these features
If you’re using new language features, you will see a performance boost
In core, still tracking down code that was specific to the old optimizer and rewriting i to work the new optimizer
Turbo C compiler hasn’t landed yet, but is to come.
Will have a completely different performance profile
In most real world applications it will be faster
Waiting on the release to take a version of V8 to make it easier to upgrade features in the future

[11:28] Are the new features picked up from V8 or implemented in Node?

It’s all in V8
Better longterm support
Promises are made better in Node as a platform
Added new method called util.promisify()
Implementation comes from V8
Allows for more optimization for promises in Node core
Promise support for the one-deprecated domains module.

[13:02] Is there anything more than NMP 5?

First off, delete your NMP cache.
It’s in your home directory usually with a .npm extension

[14:09] What are the new features in V8?

Unlimited heap sizes, previously had a 4gb limit. No fixed limit.

[14:09] Will you see things like chakra come out tuned for servers?

Profiles of a server for application process are getting smaller
Getting cut into containers and VMs and micro services
Vms that have cold boot time and run quickly in a strained environment is looking more like what we will see in the future
Yes, especially if you’re using cloud functions
V8 is optimized for phones, but Chakra is even more so
Looking for opportunities for VMs can be solely optimized for a device target
Node take advantage of that VM
VM neutrality is an interesting concept
VM Vendors trying to optimize it based on workloads of a server
Opens opportunities for Node
Node Chakra has been proved to iOS. You can cut off jitting off which was a requirement to be able to be in the Apple App Store
Node is not just for servers anymore
Node doesn’t take a long time configuring it
When a developer runs code on an IoT or a mobile app they don’t control the VM that is bundled, they run it on top of Node and it just works.
VM neutrality gives a new vector, so you can swam a whole different VM

[18:44] When running different engines like iOS vs Android, does the profile change?

What it comes down to is if it’s eventive programming
The browser is an eventive environment, is very efficient waiting for things to happen before it does something
The way that we program servers and nodes are the same as well
the basics are the same generally
environmental differences exist but the programming model is usually the same
What does impact it is memory and processor and hardware and things like that
That is where tuning the VM comes into play

[20:29] What is the new Async Hooks API used for?

Node has been lacking for automated inspection of Async Hook
No way for Node to tell you when scheduling and beginning of an Async operation. Hook helps with that
it’s a way for developers to write debugging features
Node tells the application that it’s working with Asynchronous way.
The embedded inspector has been embedded since Node 6
Now has a JavaScript API to use it
You can use things like Chrome debugger inside the running node process
Old debugging protocol has been removed
VM.run is still there but in the process of being deprecated

[22:34] How like is the experimental Node API will change?

Marked as experimental because it’s the first time in the open
Hopefully out of experimental soon
Soon can port API to the existing LTS
Looking for more people to participate with the new API and give feedback
Fix any concerns before it goes to LTS
Some other experimental things are in the works like ASync Hooks and how it interacts with promises
Renaming some features
Another new feature - serializer and deserializer that comes with V8
experimental but will most likely stay

[25:31] what is your standard for going to LTS?

Major releases every 6 months
Next Oct Node 9 will come out and then Node 8 will be LTS
Documentation, updates, additions etc will be ready then
Plan to do it for 2.5 years
Every even releases come out to LTS as the odd release comes out
Helps keeps a current line while having something new in the release line
Node 6 is the current LTS version

[27:26] What are you taking out or deprecating in Node 8?

Use the word deprecate sparingly
If many people use features, it’s hard to get rid of
Security issue with Buffer, constructor argument was ambiguous
Had added APIs that were more explicit over time and pushed those
Now it will be deprecated

[28:43] 21% - 33% Performance increase with some Node updates

Someone online updated their React app to Node 8 and found an 21% - 33% increase
Benchmarking group tests to make sure things are getting faster
V8 is always getting faster as well
Code changes fast and so there is a chance performance slows down so they have people to check
Benchmark test are all automated by a team

[30:47] Is it safe to just switch to Node 8?

For front-end, yes
clear your NPM cache
Back use cases will usually wait until LTS

[31:28] Where any of the features hard to implement?

The API work took about a year
It was a collaboration which made it interesting
IBM, Intel, Google were involved
The collaboration took a while
Also Async hooks took at least a year.
Async hooks used to be called async wraps and has been in the work for almost 3 years
many of the changes were the accumulation of small chances

[33:07] It’s the little things

Letting people get small changes in accumulate into a big difference
the product gets much better that way

[33:57] What versions of Node are you actively updating?

Current releases of Node 8 for a half of year
Node 6 is LTS
Additional year of maintenance of previous LTSs.
Schedule is at http://github.com/node8js/lts in a chart
Support for Node 4 with only critical updates, Node 6 minor updates, and Node 8
Node 7 doesn’t get much support unless it’s vital security supports.
If you’re running 0.10 or 0.12 stop. Those do not get security fixes anymore

[35:42] Where do you see things going from here?

Mostly still working out Async hooks
Maybe add some web worker or worker support for Node JS
ES module support
Working to make promises better
Working on the performance profile and internal systems

[20:29] What is the adoption like of Node 8?

Node team gets better at getting people to adopt quickly
but about 5% - 6% will not upgrade
community doubles each year at 8 million users right now
Here is a graph on Twitter posted by NPM
Limiting breaks and softly deprecating things makes it’s easier to upgrade

[40:11] How can people contribute and get involved?

NodeToDo.org shows how to make contribution
Occasionally major conferences have information on how to contribute
Test it out and help make it stronger

[42:08] If people install Node 8 and have issues what can they do?

If it’s an NPM problem check with them
clear cache!
install newest version with: npm install -g npm@latest
Report problems to either NPM or Node
If you’re not sure where the problem is, check github.com/nodejs/help

Links

Node8 Node’s Twitter Node’s Medium Node Evangelism Group

Mikael on Twitter and GitHub Arunesh on Twitter Anna on Twitter

Picks

Aremesh

Current Nightly News

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JSJ 275: Zones in Node with Austin McDaniel

By devchat.tv
Published On :: Tue, 22 Aug 2017 06:00:00 -0400

JSJ 275: Zones in Node with Austin McDaniel

The panel for this week on JavaScript Jabber is Cory House, Aimee Knight, and Charles Max Wood. They speak with special guest Austin McDaniel about Zones in Node. Tune in to learn more about this topic!

[00:01:11] Introduction to Austin

Austin has worked in JavaScript for the past ten years. He currently works in Angular development and is a panelist on Angular Air. He has spent most of his career doing work in front-end development but has recently begun working with back-end development. With his move to back-end work he has incorporated front-end ideas with Angular into a back-end concept.

[00:02:00] The Way it Works

NodeJS is an event loop. There is no way to scope the context of a call stack. So for example, Austin makes a Node request to a server and wants to track the life cycle of that Node request. Once deep in the scope, or deep in the code, it is not easy to get the unique id. Maybe he wants to get the user from Passport JS. Other languages – Python, Java – have a concept called thread local storage. They can associate context with the thread and throughout the life cycle of that request, he can retrieve that context.

There is a TC39 proposal for zones. A zone allows you to do what was just described. They can create new zones and associate data with them. Zones can also associate unique ids for requests and can associate the user so they can see who requested later in the stack. Zones also allow to scope and create a context. And then it allows scoping requests and capturing contacts all the way down.

[00:05:40] Zone Uses

One way Zone is being used is to capture stack traces, and associating unique ids with the requests. If there is an error, then Zone can capture a stack request and associate that back to the request that happened. Otherwise, the error would be vague.

Zones are a TC39 proposal. Because it is still a proposal people are unsure how they can use it. Zones are not a new concept. Austin first saw Zones being used back when Angular 2 was first conceived. If an event happened and they wanted to isolate a component and create a scope for it, they used Zones to do so. Not a huge fan of how it worked out (quirky). He used the same library that Angular uses in his backend. It is a specific implementation for Node. Monkey patches all of the functions and creates a scope and passes it down to your functions, which does a good job capturing the information.

[00:08:40] Is installing the library all you need to get this started?

Yes, go to npminstallzone.js and install the library. There is a middler function for kla. To fork the zone, typing zone.current. This takes the Zone you are in and creates a new isolated Zone for that fork. A name can then be created for the Zone so it can be associated back with a call stack and assigned properties. Later, any properties can be retrieved no matter what level you are at.

[00:09:50] So did you create the Zone library or did Google?

The Google team created the Zone library. It was introduced in 2014 with Angular 2. It is currently used in front-end development.

[00:10:12] Is the TC39 proposal based on the Zone library?

While Austin has a feeling that the TC39 proposal came out of the Zone library, he cannot say for sure.

[00:10:39] What stage is the proposal in right now?

Zone is in Stage Zero right now. Zone JS is the most popular version because of its forced adoption to Angular. He recommends people use the Angular version because it is the most tested as it has a high number of people using it for front-end development.

[00:11:50] Is there an easy way to copy the information from one thread to another?

Yes. The best way would probably be to manually copy the information. Forking it may also work.

[00:14:18] Is Stage Zero where someone is still looking to put it in or is it imminent?

Austin believes that since it is actually in a stage, it means it is going to happen eventually but could be wrong. He assumes that it is going to be similar to the version that is out now. Aimee read that Stage Zero is the implementation stage where developers are gathering input about the product. Austin says that this basically means, “Implementation may vary. Enter at your own risk.”

[00:16:21] If I’m using New Relic, is it using Zone JS under the hood?

Austin is unsure but there something like that has to be done if profiling is being used. There has to be a way that you insert yourself in between calls. Zone is doing that while providing context, but probably not using Zone JS. There is a similar implementation to tracing and inserting logging in between all calls and timeouts.

[00:17:22] What are the nuances? Why isn’t everybody doing this?

Zone is still new in the JavaScript world, meaning everyone has a ton of ideas about what should be done. It can be frustrating to work with Zone in front-end development because it has to be manually learned. But in terms of implementation, only trying to create a context. Austin recommends Zone if people want to create direct contacts. The exception would be 100 lines of Zone traces because they can get difficult.

Another issue Austin has is Node’s native basic weight. Weight hooks are still up in the air. The team is currently waiting on the Node JS community to provide additional information so that they can finish. Context can get lost sometimes if the wrong language is used. He is using Typescript and doesn’t have that problem because it is straightforward.

[00:21:44:] Does this affect your ability to test your software at all?

No, there have not been any issues with testing. One thing to accommodate for is if you are expecting certain contexts to be present you have to mock for those in the tests. After that happens, the tests should have no problems.

Picks

Cory:

Apple AirPods

Aimee:

Charles:

Austin:

NGRX Library Redux

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JSJ 279: ES Modules in Node Today! with John-David Dalton

By devchat.tv
Published On :: Tue, 19 Sep 2017 07:02:00 -0400

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John-David Dalton is probably best known for the Lodash library. He's currently working at Microsoft on the Edge team. He makes sure that libraries and frameworks work well in Edge.

The JavaScript Jabber panel discusses the ECMAScript module system port to Node.js. John wanted to ship the ES module system to Node.js for Lodash to increase speed and decrease the disk space that it takes up. This approach allows you to gzip the library and get it down to 90 kb.

This episode dives in detail into:

ES Modules, what they are and how they work
The Node.js and NPM package delivery ecosystem
Module loaders in Node.js
Babel (and other compilers) versus ES Module Loader
and much, much more...

Links:

Picks:

Cory:

Aimee:

Aaron:

Chuck:

Angular Dev Summit
ZohoCRM
Working on Cars - Therapeutic working with your hands doing physical work

John:

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JSJ 294: Node Security with Adam Baldwin

By devchat.tv
Published On :: Wed, 03 Jan 2018 20:21:00 -0500

Panel:

Charles Max Wood

AJ O’Neal

Joe Eames

Special Guests: Adam Baldwin

In this episode, JavaScript Jabber panelist speak with Adam Baldwin. Adam is a return guest and has many years of application security experience. Currently, Adam runs the Node Security Project/Node Security Platform, and Lift Security. Adam discusses the latest of security of Node Security with Charles and AJ. Discussion topics cover security in other platforms, dependencies, security habits, breaches, tokens, bit rot or digital atrophy, and adding security to your development.

In particular, we dive pretty deep on:

What is the Node Security Project/Node Security Platform
Dependency trees
NPM
Tokens and internal data
What does Node Security do for me?
NPX and NSP
Command Line CIL
Bit Rot or Digital Atrophy
How often should you check repos.
Advisories
If I NPM install?
Circle CI or Travis
NSP Check
What else could I add to the securities?
Incorporate security as you build things
How do you find the vulnerabilities in the NPM packages
Two Factor authentication for NPM
Weak Passwords
OL Dash?
Install Scripts
Favorite Security Story?
And much more!

Links:

Node Security
Lift Security
https://github.com/evilpacket
@nodesecurity
@liftsecurity
@adam_baldwin

Picks:

Adam

Charles

This Episode with Adam Baldwin
Free the Future of Radical Price
Made In America Sam Walton
Sonic - VGM Album

Joe

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JSJ 339: Node.js In Motion Live Video Course from Manning with PJ Evans

By devchat.tv
Published On :: Tue, 13 Nov 2018 06:00:00 -0500

Panel:

Aimee Knight
AJ O’Neal
Charles Max Wood

Special Guest: PJ Evans

In this episode, the panel talks with PJ Evans who is a course developer and an instructor through Manning’s course titled, “Node.js in Motion.” This course is great to learn the fundamentals of Node, which you can check out here! The panel and PJ talk about this course, his background, and current projects that PJ is working on. Check out today’s episode to hear more!

Show Topics:

0:00 – Advertisement: KENDO UI

0:36 – Chuck: Welcome and our panel consists of Aimee, AJ, myself, and our special guest is PJ Evans. Tell us about yourself and your video course! NODE JS in Motion is the title of the course. Can you tell us more?

1:29 – PJ: It’s a fantastic course.

2:25 – Chuck: You built this course and there is a lot to talk about.

2:36 – Aimee: Let’s talk about Node and the current state.

2:50 – Chuck: Here’s the latest features, but let’s talk about where do you start with this course? How do you get going with Node? What do people need to know with Node?

3:20 – Aimee.

3:24 – PJ talks about Node and his course!

4:02 – PJ: The biggest headache with Node is the...

4:13 – Chuck.

4:19 – PJ: I am sure a lot of the listeners are familiar with callback hell.

4:50 – Aimee: Let’s talk about the complexities of module support in Node!

5:10 – PJ: It’s a horrible mess.

5:17 – Aimee: Maybe not the tech details but let’s talk about WHAT the problem is?

5:31 – PJ: You are talking about Proper Native ES6 right?

They are arguing about how to implement it.

6:11 – PJ: My advice is (if you are a professional) is to stick with the LT6 program. No matter how tensing those new features are!

6:46 – Aimee: It could be outdated but they had to come back and say that there were tons of complexities and we have to figure out how to get there.

7:06 – PJ: They haven’t found an elegant way to do it.

7:15 – Panel: If it’s a standard why talk about it?

Seriously – if this is a standard why not implement THE standard?

7:38 – PJ.

8:11 – Panel.

8:17 – Aimee: I would love to talk about this, though!

8:24 – Chuck: I want to talk about the course, please.

8:30 – PJ.

8:54 – Chuck: We will keep an eye on it.

9:05 – PJ.

9:16 – PJ: How is it on the browser-side?

9:33 – Aimee: I don’t want to misspeak.

9:41 – Chuck: I don’t know how complete the forms are.

9:49 – Aimee: I don’t want to misspeak.

9:56 – PJ: I just found the page that I wanted and they are calling it the .MJS or aka the Michael Jackson Script. You can do an import from...

Some people think it’s FINE and others think that it’s a TERRIBLE idea.

10:42 – Chuck: “It sounds like it’s a real THRILLER!”

10:52 – Panel.

11:25 – Panel: When you start calling things the Michael Jackson Solution you know things aren’t well.

11:44 – Aimee: Just to clarify for users...

11:57 – Chuck: I want to point us towards the course: NODE.JS.

Chuck asks two questions.

12:34 – PJ: The concepts aren’t changing, but the information is changing incredibly fast. The fundamentals are fairly settled.

13:22 – Chuck: What are those things?

13:28 – PJ talks about how he structured the course and he talks about the specifics.

15:33 – Chuck: Most of my backend stuff is done in Ruby. Aimee and AJ do more Java then I do.

15:55 – Panel: I think there is something to understanding how different Node is. I think that Node is a very fast moving train. Node has a safe place and that it’s good for people to know about this space.

16:34 – Aimee: Not everyone learns this way, but for me I like to understand WHY I would want to use Node and not another tool. For me, this talk in the show notes really helped me a lot. That’s the core and the nature of NODE.

17:21 – PJ: Yes, absolutely. Understanding the event loop and that’s aimed more towards people from other back ends. Right from the beginning we go over that detail: Here is how it works, we give them examples, and more.

18:08 – Aimee: You can do more than just create APIs.

Aimee mentions Vanilla Node.

18:50 – PJ: To get into frameworks we do a 3-line server. We cover express, and also Sequelize ORM.

19:45 – Advertisement – Sentry.io

20:43 – Chuck: I never used Pug.

20:45 – PJ: PUG used to be called JADE.

20:56 – Aimee.

21:14 – PJ: Express does that for you and I agree with you. I advocate a non-scripted approach, I like when frameworks have a light touch.

22:05 – Aimee: That’s what I liked about it. No offense, Chuck, but for me I didn’t like NOT knowing a lot of what was not happening under the hood. I didn’t want to reinvent the wheel, but I wanted to build at a lower level.

22:40 – PJ: I had the same experience. I wanted to figure out why something wasn’t working.

23:24 – Panel: I had a friend who used Rails...he was cautious to make a switch. This past year he was blown away with how much simpler it was and how fast things were.

24:05 – Aimee: I feel like if you want to learn JavaScript then Node might be easier on the frontend.

24:21 – Chuck: No pun intended.

No, but I agree. I like about Rails is that you had well-understood patterns. But the flipside is that you have abstractions...

To a certain degree: what did I do wrong? And you didn’t follow the pattern properly.

25:57 – Panel: With Node you get a little bit of both. To me it’s a more simple approach, but the downside is that you have 100’s of 1,000’s of modules that almost identical things. When you start reaching out to NPM that...

26:29 – PJ: Yes the module system of NPM is the best/worst thing about NODE. I don’t have an answer, honestly.

There is a great article written that made me turn white. Here is the article!

28:12 – Panel: The same thing happened with the ESLint. That was the very problem that he was describing in the article.

28:50 – PJ: Yep, I put that in the chat there – go ahead and read it! It’s not a problem that’s specific to Node, there are others. It’s the way we do things now.

29:23 – Chuck: We have the NODE Security project. A lot of stuff go into NPM everyday.

29:43 – PJ: We cover those things in the course.

29:53 – Chuck: It’s the reality. Is there a place that people get stuck?

30:00 – PJ answers the question.

30:23 – Aimee.

30:55 – PJ: I am coding very similar to my PHP days.

31:20 – Aimee.

32:02 – PJ: To finish off my point, I hope people don’t loose sight.

32:18 – Aimee.

32:20 – PJ: I am working on a project that has thousands of requests for...

32:53 – Chuck: Anything you WANTED to put into the course, but didn’t have time to?

33:05 – PJ: You can get pretty technical. It’s not an advanced course, and it won’t turn you into a rock star. This is all about confidence building. It’s to understand the fundamentals.

It’s a runtime of 6 hours and 40 minutes – you aren’t just watching a video. You have a transcript, too, running off on the side. You can sit there and type it out w/o leaving – so it’s a very interactive course.

34:26 – Chuck: You get people over the hump. What do you think people need to know to be successful with Node?

34:38 – PJ answers the question.

PJ: I think it’s a lot of practice and the student to go off and be curious on their own terms.

35:13 – Chuck: You talked about callbacks – I am thinking that one is there to manage the other?

35:31 – PJ answers the question.

PJ: You do what works for you – pick your style – do it as long as people can follow you. Take the analogy of building a bridge.

36:53 – Chuck: What are you working on now?

37:00 – PJ: Educational tool called SCHOOL PLANNER launched in Ireland, so teachers can do their lesson planning for the year and being built with Express.

Google Classroom and Google Calendar.

39:01 – PJ talks about Pi and 4wd. See links below.

40:09 – Node can be used all over the place!

40:16 - Chuck: Yes, the same can be said for other languages. Yes, Node is in the same space.

40:31 – PJ: Yep!

40:33 – Chuck: If people want to find you online where can they find you?

40:45 – PJ: Twitter! Blog!

41:04 – Picks!

41:05 – Advertisement – eBook: Get a coder job!

Links:

Sponsors:

Picks:

Aimee

Paul Graham - Blog

Rust

Charles

Music - Max Richter

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JSJ 398: Node 12 with Paige Niedringhaus

By devchat.tv
Published On :: Tue, 08 Oct 2019 06:00:00 -0400

Guest Paige Niedringhaus has been a developer full time for 3 years, and today she is here to talk about Node 12. One of the things she is most excited about is the ES6 support that is now available, so things that used to require React, Angular, or Vue can now be done in Node. The require function will not have to be used in Node 12. AJ is worried about some of these changes and expresses his concerns. Paige assures him that in the beginning you won’t have to switch things to imports. You may have to change file extensions/types so Node can pick up what it’s supposed to be using. They are also trying to make it compatible with CommonJS.

Node 12 also boasts an improved startup time. The panel discusses what specifically this means. They talk about the code cache and how Node caches the built in libraries that it comes prepackaged with. The V8 engine is also getting many performance enhancements.

Paige talks about the shift from promises to async. In Node 12, async functions will actually be faster than promises. They discuss some of the difficulties they’ve had in the past with Async08, and especially callbacks.

Another feature of Node 12 is better security. The transcripted security layer (TLS), which is how Node handles encrypted strains of communication, is upgrading to 1.3. The protocol is simpler to implement, quicker to negotiate sessions between the applications, provides increased end user privacy, and reduces request time. Overall, this means less latency for everybody. 1.3 also gets rid of the edge cases that caused TLS to be way far slower than it needed to be.

The conversation turns to properly configuring default heap limits to prevent an ‘out of memory’ error. Configuring heap limits is something necessary when constructing an incredibly large object or array of objects. Node 12 also offers formatted diagnostic summaries, which can include information on total memory, used memory, memory limits, and environment lags. It can report on uncaught exceptions and fatal errors. Overall, Node 12 is trying to help with the debugging process. They talk about the different parsers available and how issues with key pairing in Node have been solved.

Paige talks about using worker threads in Node 12. Worker threads are really beneficial for CPU intensive JavaScript operations. Worker threads are there for those things that eat up all of your memory, they can alleviate the load and keep your program running efficiently while doing their own operations on the sideline, and returning to the main thread once they’ve finished their job. None of the panelists have really used worker threads, so they discuss why that is and how they might use Worker Threads in Node 12.

In addition, Node 12 is making Native module creation and support easier, as well as all the different binaries a node developer would want to support. Paige makes it a point to mention the new compiler and minimum platform standards. They are as follows:

GCC minimum 6
GLIVC minimum 2.17 on platforms other than Mac and Windows (Linux)
Mac users need at least 8 and Mac OS 10.10
If you’ve been running node 11 builds in Windows, you’re up to speed
Linux binaries supported are Enterprise Linux 7, Debian 8, and Ubuntu 14.04
If you have different requirements, go to the Node website

Panelists

J.C. Hyatt
Steve Edwards
AJ O’Neal

With special guest: Paige Niedringhaus

Sponsors

Tidelift
Sentry use the code “devchat” for 2 months free on Sentry’s small plan
Sustain Our Software

Links

Follow DevChatTV on Facebook and Twitter

Picks

J.C. Hyatt:

AWS Amplify framework
12 Rules for Life: An Antidote to Chaos by Jordan Petersen
React and Gatsby workshops

Steve Edwards:

The Farside comic coming back?

AJ O’Neal:

Paige Niedringhaus:

Follow Paige on Twitter, Medium, and Github

Full Article

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JSJ 406: Security in Node

By devchat.tv
Published On :: Tue, 05 Nov 2019 05:00:00 -0500

Today the panel is talking about security features that are being added to Node 13. AJ talks about the background and what he’s working with Let’s Encrypt. He talks about changes that Node has made to the TLS module. TLS is a handshake that happens between a client and a server. They exchange certificates, generate some random numbers to use for encryption, and TLS handles the encryption. The move to HTTP/2 is all about fixing legacy bugs and legacy features from the SSL days and reducing the number of handshakes.

AJ talks about the difference between TLS and HTTPS. While TLS reduces the handshakes between client and server, HTTPS is just HTTP and has no knowledge that TLS is going on. HTTP/2 is more baked in as both encryption and compression are part of the specification and you get it automatically. HTTP/2 is also supposed to be faster because there’s fewer handshakes, and you can build heuristic based web servers. Since browsers have varying degrees of compatibility, a smart HTTP/2 server will classify the browser and anticipate what files to send to a client based on behavior and characteristics without the client requesting them

A lot of these new features will be built into Node, in addition to some other notable features. First, there will now be set context on the TLS object. Second, if you’re connected to a server, and the server manages multiple domains, the certificate will have multiple names on it. Previously, each different server name had a different network request, but now a .gitcertificate will let you get all the metadata about the certificate, including the primary domain and all the secondary domains and reuse the connections.

These new features are a great improvement on the old Node. Previously, the TLS module in Node has been an absolute mess. These are APIs that have been long neglected, and are long overdue core editions to Node. Because of these additions, Node Crypto has finally become usable. HTTP/2 is now stable, usable, and has backwards compatable API, and a dictionary of headers to make it more efficient in compression.

The conversation turns back to certificates, and AJ explains what a certificate is and what it represents. A certificate has on it a subject, which is a field which contains things like common name, which in the case of HTTPS is the server name or host name. then it will have subject alternative names (SAN), which will have a list of other names that are valid on that certificate. Also included on the certificate is the name of the authority that issued the certificate. AJ talks about some of the different types of certificates, such as DV, OV, and EV certificates. They differentiate between encryption and hashing. Hashing is for verifying the integrity of data, while encryption can be used either as signing to verify identity or to keep data owned privately to the parties that are part of the connection. Encryption does not necessarily guarantee that the data is the original data. The show concludes with AJ talking about how he wants to make encryption available to the average person so that everyone can share securely.

Panelists

Steve Edwards
AJ O’Neal
Charles Max Wood

Sponsors

Tidelift
Sentry use the code “devchat” for 2 months free on Sentry’s small plan
Ruby Rogues

Links

Let’s Encrypt
Greenlock
HTTP/2
Node.js
Node Crypto
JWK
LZMA
Gzip
Broccoli.js
HTTPS
GCM
ASN.1
OWASP list
jwt.io
Diffie Hellman Key Exchange
Khana Academy Diffie-Hellman Key Exchange pt.2

Follow DevChatTV on Facebook and Twitter

Picks

Steve Edwards:

Panasonic SD-YD250 bread machine

AJ O’Neal:

Greenlock v.3
Samsung Evo 4 TOB paired with 2012 Macbook Pro
Dave Ramsey on Christian Healthcare Ministries

Charles Max Wood:

Velcro straps
Mac Pro Upgrade Guide

Full Article

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[ASAP] Core–Shell C@Sb Nanoparticles as a Nucleation Layer for High-Performance Sodium Metal Anodes

By feedproxy.google.com
Published On :: Thu, 07 May 2020 04:00:00 GMT

Nano Letters

DOI: 10.1021/acs.nanolett.0c01257

Full Article

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Handbook of semiconductor nanostructures and nanodevices / edited by Alexander A. Balandin, Kang L. Wang

By prospero.murdoch.edu.au
Published On ::

Full Article

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Nanodevices for the life sciences / edited by Challa S.S.R. Kumar

By prospero.murdoch.edu.au
Published On ::

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ESI hospital gets nod for Covid-19 plasma trials

By timesofindia.indiatimes.com
Published On :: Sat, 09 May 2020 04:46:00 IST

ESI Hospital at Sanathnagar have received permission to carry out plasma therapy trials for Covid- 19 patients along with the state-run Gandhi Hospital. ICMR officially accorded permission to both hospitals for six months.

Full Article

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Punjab Cabinet nod for non-teaching staff transfer policy

By www.thehindu.com
Published On :: Sat, 09 May 2020 02:57:03 +0530

State mulling changes in excise policy, labour laws amid lockdown

Full Article

Other States

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Supply chain management [electronic resource] / Vinod V. Sople

By prospero.murdoch.edu.au
Published On ::

Sople, Vinod V., author

Full Article

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Web development with MongoDB and Node JS [electronic resource] : build an interactive and full-featured web application from scratch using Node.js and MongoDB / Mithun Sathessh, Bruno Joseph D'mello, Jason Krol

By prospero.murdoch.edu.au
Published On ::

Satheesh, Mithun, author

Full Article

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Goan firm gets nod for rapid Covid-19 test

By timesofindia.indiatimes.com
Published On :: Fri, 08 May 2020 12:26:10 IST

Goan diagnostic system manufacturer, Tulip Diagnostics (P) Ltd, has received the nod from the Central Drugs Standard Control Organisation (CDSCO) to manufacture ‘Coviscreen’, a rapid, double antigen test for total antibodies to Sars-Cov2 virus.

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The influence of motility of rhizobium leguminosarum biovar trifolii TA1 on the colonization and nodulation of roots of trifolium subterraneum cv. Mt. Barker / by Socorro Z. Parco

By prospero.murdoch.edu.au
Published On ::

Parco, Socorro Z., author

Full Article

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Hollow-structure engineering of a silicon–carbon anode for ultra-stable lithium-ion batteries

By feeds.rsc.org
Published On ::

Dalton Trans., 2020, 49,5669-5676
DOI: 10.1039/D0DT00566E, Paper

Hongbin Liu, Yun Chen, Bo Jiang, Yue Zhao, Xiaolin Guo, Tingli Ma
Hollow silicon nanotubes were successfully synthesized in situ on a carbon substrate, which effectively accommodate the volume expansion of silicon and exhibit ultra-stable performance as the anode of lithium-ion batteries.
The content of this RSS Feed (c) The Royal Society of Chemistry

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A novel self-assembled-derived 1D MnO2@Co3O4 composite as a high-performance Li-ion storage anode material

By feeds.rsc.org
Published On ::

Dalton Trans., 2020, Advance Article
DOI: 10.1039/D0DT00980F, Paper

Zongtang Li, Xiao Lian, Mingzai Wu, Fangcai Zheng, Yuanhao Gao, Helin Niu
Manganese dioxide (MnO₂) is a high-performance anodic material and applied widely in lithium-ion batteries (LIBs).
To cite this article before page numbers are assigned, use the DOI form of citation above.
The content of this RSS Feed (c) The Royal Society of Chemistry

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Chaina inpakuto : kinrin kara mita taitō to kyōi = China impact : threat perception in the Asia-Pacific region / Sonoda Shigeto ; Goodman David S.G

By prospero.murdoch.edu.au
Published On ::

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A COVID-19 diagnostic that uses CRISPR gets a nod from the FDA

By feedproxy.google.com
Published On :: 07 May 2020 22:31:56 +0000

Sherlock Biosciences' test becomes the first FDA-authorized CRISPR technology on the market

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The Synod of Dort Was Protestantism’s Biggest Debate

By feeds.christianitytoday.com
Published On :: Mon, 16 Dec 2019 00:00:00 PST

Why Arminians and Reformers squared off 400 years ago.

Full Article

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Faust / Charles Gounod

By library.mit.edu
Published On :: Sun, 15 Mar 2020 07:17:48 EDT

STACK BOOKS PhonCD G741 fa c

Full Article

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Hierarchical porous carbon nanofibers for compatible anode and cathode of potassium-ion hybrid capacitor

By feeds.rsc.org
Published On ::

Energy Environ. Sci., 2020, Advance Article
DOI: 10.1039/D0EE00477D, Paper

Xiang Hu, Guobao Zhong, Junwei Li, Yangjie Liu, Jun Yuan, Junxiang Chen, Hongbing Zhan, Zhenhai Wen
Hierarchical porous carbon nanofibers can efficiently eliminate kinetics and capacity mismatches between the anode and cathode of the potassium-ion hybrid capacitor.
To cite this article before page numbers are assigned, use the DOI form of citation above.
The content of this RSS Feed (c) The Royal Society of Chemistry

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Sporulation of Stagonospora nodorum / Rohan George Thomas Lowe

By prospero.murdoch.edu.au
Published On ::

Lowe, Rohan George Thomas

Full Article

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Interactions between Phytophthora cinnamomi and Acacia pulchella : consequences on ecology and epidemiology of the pathogen / Arunodini Uthpalawanna Jayasekera

By prospero.murdoch.edu.au
Published On ::

Jayasekera, Arunodini Uthpalawanna

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Metabolism and infection in the Stagonospora nodorum-wheat pathosystem / Ormonde Dominick Creagh Waters

By prospero.murdoch.edu.au
Published On ::

Waters, Ormonde Dominick Creagh

Full Article

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Pathogenicity of Stagonospora nodorum / Vong Shian Simon Ip Cho

By prospero.murdoch.edu.au
Published On ::

Ip Cho, Vong Shian Simon

Full Article

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Bioinformatic genome analysis of the necrotrophic wheat-pathogenic fungus Phaeosphaeria nodorum and related Dothideomycete fungi / James Kyawzwar Hane

By prospero.murdoch.edu.au
Published On ::

Hane, James Kyawzwar

Full Article

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A metabolomic analysis of G-protein signalling mutants of Stagonospora nodorum / Joel Paul Aloysius Gummer

By prospero.murdoch.edu.au
Published On ::

Gummer, Joel Paul Aloysius

Full Article

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Polyketide synthesis in Stagnospora nodorum / Christian Krill

By prospero.murdoch.edu.au
Published On ::

Krill, Christian

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Insights into the genome and secretome of Didymella pinodes, the causal agent of Ascochyta blight of pea / Francis K. Kessis

By prospero.murdoch.edu.au
Published On ::

Kessie, Francis K

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Tiruvannamalai wholesale traders seek Collector’s nod to resume fruit and vegetable sales

By www.thehindu.com
Published On :: Sat, 09 May 2020 19:09:48 +0530

Officer bearers say they are ready to adhere to protocols if permission is granted.

Full Article

Tamil Nadu

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Farewell Vinod Khanna: Heaven must be full of swagger today

By www.rediff.com
Published On :: Thu, 27 Apr 2017 18:55:56 +0530

Sukanya Verma could not resist Vinod Khanna's charms, and salutes him in her tribute.

Full Article

Vinod Khanna
VK
Cinthol
Amar Akbar Anthony
IMAGE
Manmohan Desai
Amitabh Bachchan
Mera Gaon Mera Desh
Feroz Khan
Neetu Singh
Sukanya Verma
Shatrughan Sinha
Muqaddar Ka Sikandar
FK
RIP
Maha Badmaash

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Vinod Khanna: An actor with a touch of sadness

By www.rediff.com
Published On :: Fri, 28 Apr 2017 09:31:02 +0530

Aseem Chhabra sensed an internal turmoil in Vinod Khanna, which sometimes showed the moody person on screen.

Full Article

Vinod Khanna
Amitabh Bachchan
Gulzar
Gaya Hai Pyar
Rishi Kapoor
Rajneesh
Anthony
Shabana Azmi
Sikander
IMAGE
Purva Suhani Aayee Re
Mera Gaon Mera Desh
Koi Hota Jisko Apna
Reshma Aur Shera
Aseem Chhabra
Parveen Babi

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Hyderabad: ESI hospital gets nod for Covid-19 plasma trials

By
Published On ::

Hyderabad: ESI hospital gets nod for Covid-19 plasma trials

Full Article

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Highlight.js 10, Node 14, and modern React in 20 minutes

By javascriptweekly.com
Published On :: Fri, 24 Apr 2020 00:00:00 +0000

#485 — April 24, 2020

Unsubscribe : Read on the Web

JavaScript Weekly

Introducing Crank.js: A New JSX-Driven Framework — A new framework for creating JSX-driven components with functions, promises and generators. If you haven’t got time to read the creator’s lengthy (but well worth reading!) rationale for creating another framework, check out the GitHub repo or jump straight into a CodeSandbox example. I hope to see a lot more about this in the near future.

Brian Kim

The Cost of JavaScript Frameworks — Using data from the HTTP Archive, Tim explores the performance cost of using various popular frameworks as a starting point. Some good analysis here.

Tim Kadlec

You Hacked the Gibson? Yeah, They Built Their Own Login — Don't let Crash Override pwn your app. FusionAuth adds secure login, registration and user management to your app in minutes not months. Download our community edition for free.

FusionAuth sponsor

Node.js 14 Released — v14 now becomes the current ‘release’ line with it becoming a LTS (Long Term Support) release in October. Diagnostic reports are now a stable feature, it now uses V8 8.1, there's an experimental Async Local Storage API, and more.

Michael Dawson and Bethany Griggs

Vidact: A Compiler to Convert React-like Apps to Vanilla JS — Compiles pure React-compatible JavaScript (JSX) to vanilla JavaScript with no virtual DOM.. think similar to Svelte, but without introducing a new syntax. A curious idea.

Mohamad Mohebifar

Highlight.js 10.0: The Web Syntax Highlighter Library — I always laugh when I see a big release of a popular library and saw we last linked it 5 years ago ???? Nonetheless, this is a big release and Highlight.js continues to be a fantastic library for syntax highlighting code.

highlight.js

???? Jobs

Senior Full-stack Developer (Malmö/Sweden) — Every day is different from the next. Join our upbeat Team and work on exciting, major projects using a modern JavaScript stack.

Ortelius AB

Find a Job Through Vettery — Vettery specializes in tech roles and is completely free for job seekers. Create a profile to get started.

Vettery

???? Tutorials

▶ React: The Basics in 20 Minutes — A well presented, up to date (yep, it covers hooks) tutorial that doesn’t hang around, whether you’re new to React or just want a refresher.

Devistry

Creating Web Apps via TypeScript and webpack — The example app doesn’t use any front-end framework, just vanilla DOM APIs. Some knowledge of TypeScript, webpack, and npm are required, but this is a neat way to bring together a bunch of tools.

Axel Rauschmayer

What Is The toJSON() Function? — If an object has a toJSON function, JSON.stringify() calls toJSON() and serializes the return value from toJSON() instead.

Valeri Karpov

A Much Faster Way to Debug Code Than with Breakpoints or console.log — Move forward and backwards through your code to understand what led to a specific bug, view runtime values, edit-and-continue, and more.

Wallaby.js sponsor

How Does TypeScript Work? A Bird’s Eye View — Dr. Axel goes into depth on the structure of a typical TypeScript project, what gets compiled, and how can an IDE be used to write TypeScript. Aimed at people who haven’t yet picked TypeScript up.

Axel Rauschmayer

10 Lesser Known Angular Features You've Probably Never Used

W3Radar

You Might Not Need switch — Using an object of outcomes instead of switch suits many use cases, though take care over readability.

Valentino Gagliardi

???? Upcoming Online Events

Pick JS (May 8) — Aimed at intermediate to expert JS developers rather than beginners.
JavaScript Remote Conf 2020 (May 14-15) — Speakers lined up already include Douglas Crockford, Aimee Knight and Christian Heilmann.
ESNEXT CONF 2020 (May 18-22) — From the Pika folks (of Snowpack fame). 12 speakers over 5 days so it's a gradual pace.
ForwardJS (May 26-29) — A real world event (ForwardJS Ottawa) that has now become a virtual event.
CascadiaJS 2020 (September 1-2) — This upcoming online conference is set to take place in September, and the CFP is open now through May 15.

???? Code & Tools

Phelia: A Reactive Slack Application Framework — If you think Slack apps were all about text bots, think again.. you can now create apps complete with in-app UIs. Phelia brings the React approach to the task.

Max Chehab

Marked.js 1.0: A Fast Markdown Parser and Compiler — Got Markdown to render? Marked.js to the rescue. While the project is years old, 1.0 has dropped just this week. Here’s a live demo.

Christopher Jeffrey

Stream Chat API & JavaScript SDK for Custom Chat Apps — Build real-time chat in less time. Rapidly ship in-app messaging with our highly reliable chat infrastructure.

Stream sponsor

Alpine.js: A Minimal Framework for Composing JS Behavior in Your Markup — We only gave Alpine a brief link when it first dropped but with new versions coming out thick and fast, we think it’s well worth a look. Billed as “like Tailwind for JavaScript”, Alpine lets you keep the HTML you know and love and just pepper it with JavaScript as and where appropriate.

Alpine.js

enroute: A React Router with a Small Footprint for Modern Browsers

TJ Holowaychuk

Rosetta: A General Purpose Internationalization Library in 292 Bytes — Less than 300 bytes, but does have a few dependencies. Aims to be very simple and is targeted at basic string use cases.

Luke Edwards

NAB 2020 May Be Canceled, But The Full Bitmovin Experience Is Not

Bitmovin Inc. sponsor

Hotkey 1.4: Trigger an Action on an Element When a 'Hotkey' is Pressed — Use Hotkey, set the data-hotkey attribute on your elements, and you get keyboard shortcuts. GitHub built and uses it (look for the data-hotkey attributes on their pages).

GitHub

web-worker: Consistent Web Workers for the Browser and Node — In Node it works as a web-compatible Worker implementation atop worker_threads. In the browser it’s an alias for Worker.

Jason Miller

Full Article

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Natural History of Benign Thyroid Nodules

By dx.doi.org
Published On :: Tue, 03 Mar 2015 16:00:00 +0000

Interview with Sebastiano Filetti, MD, author of The Natural History of Benign Thyroid Nodules

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Deep Learning Algorithms for Detection of Lymph Node Metastases From Breast Cancer

By traffic.libsyn.com
Published On :: Tue, 12 Dec 2017 16:00:00 +0000

Interview with Jeffrey Alan. Golden, MD, author of Deep Learning Algorithms for Detection of Lymph Node Metastases From Breast Cancer: Helping Artificial Intelligence Be Seen

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Equitas Small Finance Bank gets Sebi nod for IPO worth Rs 550 crore

By www.business-standard.com
Published On :: Tue, 03 Mar 2020 13:36:00 +0530

JM Financial, Edelweiss Financial Services and IIFL Securities are managing the offer

Full Article

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A biodegradable CO2-based polymeric antitumor nanodrug via a one-pot surfactant- and solvent-free miniemulsion preparation

By pubs.rsc.org
Published On ::

Biomater. Sci., 2020, 8,2234-2244
DOI: 10.1039/C9BM01931F, Paper

Qiaojie Luo, Xiaojun Li, Ying Wang, Jianfang He, Qiao Zhang, Pengfei Ge, Xia Cai, Qiang Sun, Weipu Zhu, Zhiquan Shen, Xiaodong Li
A biodegradable CO₂-based polymeric nanodrug is obtained via a surfactant- and solvent-free miniemulsion preparation, which can be concentrated at tumor site by EPR and releases the encapsulated drug through pH responsiveness.
The content of this RSS Feed (c) The Royal Society of Chemistry

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In situ conversion of rose bengal microbubbles into nanoparticles for ultrasound imaging guided sonodynamic therapy with enhanced antitumor efficacy

By pubs.rsc.org
Published On ::

Biomater. Sci., 2020, 8,2526-2536
DOI: 10.1039/C9BM02046B, Paper

Rui Hou, Xiaolong Liang, Xiaoda Li, Xu Zhang, Xiaotu Ma, Fan Wang
Sonosensitizer microbubbles enhance drug accumulation and the antitumor efficacy of sonodynamic therapy by ultrasound mediated micro to nano conversion.
The content of this RSS Feed (c) The Royal Society of Chemistry

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Realization of high-quality optical nanoporous gradient-index filters by optimal combination of anodization conditions

By feeds.rsc.org
Published On ::

Nanoscale, 2020, 12,9404-9415
DOI: 10.1039/C9NR10526C, Paper

Cheryl Suwen Law, Siew Yee Lim, Lina Liu, Andrew D. Abell, Lluis F. Marsal, Abel Santos
High-quality nanoporous anodic alumina gradient-index filters are realized by sinusoidal pulse anodization under optimized anodization conditions.
The content of this RSS Feed (c) The Royal Society of Chemistry

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MOF-derived lithiophilic CuO nanorod arrays for stable lithium metal anodes

By feeds.rsc.org
Published On ::

Nanoscale, 2020, 12,9416-9422
DOI: 10.1039/D0NR01091J, Paper

Lei Wei, Li Li, Teng Zhao, Nanxiang Zhang, Yuanyuan Zhao, Feng Wu, Renjie Chen
MOF-derived CuO nanorod arrays with lithiophilic groups were fabricated on a Cu foil current collector (CuO NAs/CF) to produce stable lithium metal batteries with uniform, dendrite-free Li deposition.
The content of this RSS Feed (c) The Royal Society of Chemistry

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