#upgrade node js latest version | Explore Tumblr posts and blogs

ailtrahq · 2 years ago

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This week’s Cardano (ADA) development update has been published and it detailed some of the significant upgrades and improvements that were introduced on various protocols in the ecosystem. Lace Wallet Sees New Integrations According to the published report, the team behind the browser-based wallet Lace has moved forward with the integration of Metadex, the filtering of user-owned trading tokens, and some bug fixes. In addition to this, the team also made some effort toward testing native token minting as well as the creation of custom liquidity pools for decentralized exchanges. The Lace team designed an end-to-end test for swapping native tokens and conducted some load/performance testing. Issues with the hardware wallet transactions with the DApp connector were fixed. They worked on finalizing the collateral in a round-trip action as they had already started the process a few weeks back. Also, the team extended CIP-30 to clear a path for enabling additional extensions and added more automation tests for Lace. Last month, some of the key updates on the Lace Wallet were around improving the serialization library in the cardano-js-sdk, updating the UI for network switching within the wallet and enhancing collateral settings. Most of these upgrades are necessary to ensure that users are safe and are not exposed to potential risks. More Updates on Mithril and Hydra Head The Hydra team, on the other hand, had several meetings including the monthly review meeting for August. Here, the project was evaluated and its progress was highlighted with feedback. The goal of this monthly meeting is to ensure that communication is as transparent as it should be all the time. To promote community engagement and educate community members, a masterclass was held by the Hydra team at the RareEvo workshop. Before now, the team launched version 0.12.0 of the Layer-2 scaling solution and per a statement from Cardano developer Sebastian Nagel, this version is well-compatible with the Cardano Node version 8.1.2 and the Mithril protocol. Currently, the Hydra demo and the tutorial have been updated to include Mithril and the latest release changes. Meanwhile, the Mithril team attended to the implementation of the second phase of the stress test tool which is usually used for benchmarking aggregators. The team also worked on boosting the verification of the produced snapshot archives amongst several other updates. These comprehensive updates were targeted at boosting the performance and functionality of the Cardano blockchain as a whole. Source

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tutorials-website · 5 years ago

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we’ll cover all methods of how to upgrade NodeJs to Latest version in Linux Os, Ubuntu Os, Windows 7, 8, 10, and Mac Osx using NPM (Node Package Manager) and NVM (Node Version Manager).

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80004003 · 6 years ago

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Adding decorator support to Create React App projects using react-app-rewired

Any experienced frontend developer should be familiar with the number one complaint about frontend development in recent years: it's too difficult to get started. You've heard of this thing called React and so you install it and give it a try; only to find that it doesn't "just work" and requires Babel, Webpack, npm and Node just to get started.

To help people conquer that cliff, Facebook developer and Redux author Dan Abramov created Create React App, which handles most of the difficult configuration work without you ever having to even see it and lets you get right down to work. It's an elegant solution that works well even for larger applications that get deployed to production environments: at my workplace we've been developing two applications with it for over two years now.

Of course, there's a flipside to the magic of "it just works", which is that if something doesn't work, it "just doesn't work". By handling the bundling configuration under the hood it's impossible to make even small adjustments, such as adding new Babel plugins.

It's at that point where I found myself recently, working on one of those production applications and wanting to use the proposed decorator syntax. While CRA does let you "eject" the config files so you can edit them, this also means you basically stop using CRA; it's a one-way operation that adds a ton of complicated files to your project, which now you have to maintain forever. Even as an experienced frontend developer, I'd rather not.

Fortunately, there is a way to make small changes to the bundling setup without having to give up the convenience of zero-config. To do so, we need to swap out the core scripting component of CRA with react-app-rewired, which is an alternative that allows config overrides. Together with the convenience functions provided by customize-cra you can add almost any feature you like with just a few lines.

Here's a step by step guide to add decorators (although you can use any of the other plugins described in the customize-cra readme file after this):

1. If you're starting a new project, just run Create React App like normal.

$ npx create-react-app my-app

The following steps will work with any existing app as long as you're using CRA 2.0 or up—check that your version of react-scripts is above 2.0.0 in your package.json file to verify this. CRA 3.0 should work as well—see the update below.

2. Add react-app-rewired and customize-cra, and any Babel plugins you want to use.

Since we're adding decorators, we'll also add the @babel/plugin-proposal-decorators package.

$ yarn add --dev customize-cra react-app-rewired @babel/plugin-proposal-decorators

3. Open your package.json file and edit the start, build and test scripts.

"scripts": { - "start": "react-scripts start", - "build": "react-scripts build", - "test": "react-scripts test", + "start": "react-app-rewired start", + "build": "react-app-rewired build", + "test": "react-app-rewired test", "eject": "react-scripts eject" },

The eject script stays the way it is, since react-app-rewired becomes unnecessary the moment you run it.

4. Create a config-overrides.js file in your project root.

This is where we'll define our modifications. For now, add the following:

const { override, addDecoratorsLegacy } = require('customize-cra') // Adds legacy decorator support to the Webpack configuration. module.exports = override(addDecoratorsLegacy())

And that's it; we're done. Not a second spent digging through Babel or Webpack documentation.

Now let's run yarn start to boot up the dev server and give it a try. If you want a quick example to copypaste to see if it's working, try this:

import React from 'react' // Decorator that passes on a 'message' property to a class. const addMessage = (str) => (component) => { component.prototype.message = str } @addMessage('Hello world!') class DecoratorTest extends React.PureComponent { render() { return <div>{ this.message }</div> } } export default DecoratorTest

If all went well, this component should evaluate to <div>Hello world!</div>.

There's one obvious caveat to this whole setup: the currently supported version of decorators is legacy and will eventually go away. The proposed new version will change how they work on a fundamental level and the syntax will be subtly different. For example, future decorators will need to come after the export keyword, whereas legacy decorators can appear before it.

However, the intent is for future decorators to be fundamentally compatible with the widely used legacy ones, and one of the spec design goals is to allow upgrading to the new syntax automatically via a codemod.

Keep yourself apprised by following the decorator proposal Github repo.

Update 2019-04-23: just yesterday, the Create React App team released their long awaited new major version 3.0.0. I've only done a quick test so far, but it seems everything still works as before. You can set the react-scripts peer dependency to 3.0.0 and still use the latest react-app-rewired and customize-cra packages like normal. I was able to add decorators and also Less support and both of them worked without a hitch. If problems do crop up later, I will update this post.

#js #coding #react

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veworminder · 3 years ago

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REACT ROUTER DOM LATEST VERSION UPDATE

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React package and browser build no longer includes React DOM, Improved development performance, Fixed occasional test failures, update batchedUpdates API, React Perf, and ReactTestRenderer.create().

REACT ROUTER DOM LATEST VERSION UPGRADE

Improve performance of development builds, Cleanup internal hooks, Upgrade fbjs, Improve startup time of React, Fix memory leak in server rendering, fix React Test Renderer, Change trackedTouchCount invariant into a console.error. Include component stack information, Stop validating props at mount time, Add, Add onLoad handling to and onError handling to element, Add isRunning() API, Fix performance regression.Īdd React.PureComponent, Fix issue with nested server rendering, Add xmlns, xmlnsXlink to support SVG attributes and referrerPolicy to HTML attributes, updates React Perf Add-on, Fixed issue with ref. Initial render now uses document.createElement instead of generating HTML, No more extra s, Improved SVG support, ReactPerf.getLastMeasurements() is opaque, New deprecations introduced with a warning, Fixed multiple small memory leaks, React DOM now supports the cite and profile HTML attributes and cssFloat, gridRow and gridColumn CSS properties.įix a batching bug, Ensure use of the latest object-assign, Fix regression, Remove use of merge utility, Renamed some modules. props access on DOM nodes, Fixed scryRenderedDOMComponentsWithClass, Added react-dom.js. Support for comment nodes ) introduced to deprecate ansferPropsTo, Added support for acceptCharset, classID, manifest HTML attributes, added to API, React.DOM no longer required, Fixed issues with CSS Transitions.ĭeprecated patterns that warned in 0.12 no longer work, ref resolution order has changed, Removed properties this._pendingState and this._rootNodeID, Support ES6 classes, Added API React.findDOMNode(component), Support for iterators and immutable-js sequences, Added new features, deprecated .Īdded support for srcLang, default, kind attributes, and color attribute, Ensured legacy. You can also see the full documentation for recent releases on GitHub. A complete release history for React is given below.

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webstorm-crack-op · 3 years ago

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whetcloud1 · 3 years ago

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What are the Latest Feature In Node Js 18

Node Js is an open-source JavaScript runtime environment particularly used for back-end development. The Previous version of Node Js was Node Js 17, which were given changed with Node Js 18, launched on nineteenth April 2022. One of the most important functions of Node Js 18 it's up to date JavaScript V8 engine 10.1 and, by way of means of default, enabled Global fetch.

Node Js 18 will be painted because of the contemporary launch for the primary six months of launch, and after the entirety of six months in October 2022, Node Js 18 may be transformed into Long Term Support ( LTS ) model. Once it receives into LTS, this LTS launch may be referred to as Hydrogen. Node Js 18 may be in guide until April 2025.

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groovyhunter454 · 4 years ago

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Supported version: 0.6.7

While you don't need a fresh install of macOS to use OpenCore, some users prefer having a fresh slate with their boot manager upgrades.

To start we'll want to grab ourselves a copy of macOS. You can skip this and head to formatting the USB if you're just making a bootable OpenCore stick and not an installer. For everyone else, you can either download macOS from the App Store or with Munki's script.

# Downloading macOS: Modern OS

This is going to take a while as we're downloading the entire 8GB+ macOS installer, so it's highly recommended to read the rest of the guide while you wait. Once finished, you'll find in your /macOS-Installer/ folder a DMG containing the macOS Installer, called InstallmacOS11.1-20C69.dmg for example. Mount it and you'll find the installer. Run the Windows installer in UEFI mode (make sure you boot with the UEFI entry corresponding to the Windows installer USB/DVD) After installing Windows, you may lose Clover. This is because Windows has set itself as the active UEFI bootloader (a UEFI BIOS setting, often hidden). To recover Clover, easy way. However, I still have a disc image of Mavericks sitting on an external hard drive, a USB stick and access to a notebook with Windows 7. I haven't yet found any tutorial on how to create a bootable USB drive on Windows in order to reinstall OS X on my beloved Macbook Air. Permanent Redirect.

This method allows you to download macOS 10.13 and newer, for 10.12 and older see Downloading macOS: Legacy OS

From a macOS machine that meets the requirements of the OS version you want to install, go directly to the App Store and download the desired OS release and continue to Setting up the installer.

For machines that need a specific OS release or can't download from the App Store, you can use the Munki's InstallInstallMacOS utility. Claw game for mac download.

In order to run it, just copy and paste the below command in a terminal window: Windows 7 ultimate 32 bit download.

As you can see, we get a nice list of macOS installers. If you need a particular versions of macOS, you can select it by typing the number next to it. For this example we'll choose 10:

Node.js® is a JavaScript runtime built on Chrome's V8 JavaScript engine. Latest LTS Version: 14.16.0 (includes npm 6.14.11) Download the Node.js source code or a pre-built installer for your platform, and start developing today. If you can't get Node.Js to work on your computer, do the following to reset it: Open the installation folder. Find the 'nodejs' folder and delete it. Double-click the Node.Js installation file to restart the installation. Use the default settings to install Node.Js. Node js install on mac. Node.js® is a JavaScript runtime built on Chrome's V8 JavaScript engine. #BlackLivesMatter New security releases now available for 15.x, 14.x, 12.x and 10.x release lines. Fortunately, for Windows users, the Node.js® installation process is a lot easier than how I recommend installing Node.js® on a Mac. Node isn’t a program that you simply launch like Word or Photoshop: you won’t find it pinned to the taskbar or in your list of Apps.

macOS 11, Big Sur Note: As this OS is quite new, there's still some issues with certain systems to resolve. For more information, see here: OpenCore and macOS 11: Big Sur

For first time users, we recommend macOS 10.15, Catalina

Nvidia GPU Note: Reminder to verify whether your hardware support newer OSes, see Hardware Limitations

This is going to take a while as we're downloading the entire 8GB+ macOS installer, so it's highly recommended to read the rest of the guide while you wait.

Once finished, you'll find in your ~/macOS-Installer/ folder a DMG containing the macOS Installer, called Install_macOS_11.1-20C69.dmg for example. Mount it and you'll find the installer application.

Note: We recommend to move the Install macOS.app into the /Applications folder, as we'll be executing commands from there.

Note 2: Running Cmd+Shift+G in Finder will allow you to easily jump to ~/macOS-installer

From here, jump to Setting up the installer to finish your work.

# Downloading macOS: Legacy OS

This method allows you to download much older versions of OS X, currently supporting all Intel versions of OS X(10.4 to current)

Legacy macOS: Offline method

10.10-10.12 Supported

Legacy macOS: Online method(10.7-10.15 Supported)

10.7-11 Supported

Legacy macOS: Disk Images

10.4-10.6 Supported

# Setting up the installer

Now we'll be formatting the USB to prep for both the macOS installer and OpenCore. We'll want to use macOS Extended (HFS+) with a GUID partition map. This will create two partitions: the main MyVolume and a second called EFI which is used as a boot partition where your firmware will check for boot files.

Note: By default, Disk Utility only shows partitions – press Cmd/Win+2 to show all devices (alternatively you can press the View button)

Note 2: Users following 'Legacy macOS: Online method' section can skip to Setting up OpenCore's EFI environment

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Next run the createinstallmedia command provided by Apple(opens new window). Note that the command is made for USB's formatted with the name MyVolume:

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This will take some time so you may want to grab a coffee or continue reading the guide (to be fair you really shouldn't be following this guide step by step without reading the whole thing first).

You can also replace the createinstallmedia path with that of where your installer's located (same idea with the drive name).

Legacy createinstallmedia Commands

Pulled from Apple's own site: How to create a bootable installer for macOS(opens new window)

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For systems not supporting UEFI boot, see below:

Setting up Legacy Boot

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To start, you need the following:

BootInstall_IA32.tool or BootInstall_X64.tool

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Install USB(Created above)

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Within your OpenCore build folder, navigate to Utilities/LegacyBoot. Here you'll find a file called BootInstall_ARCH.tool. What this does is install DuetPkg to your desired drive.

Now run this tool in terminal with sudo(This tool will likely fail otherwise):

This will give you a list of available disks, choose yours and you will be prompted to write a new MBR. Choose yes(y) and you'll be finished.

This will provide you with an EFI partition with either a bootia32 or bootx64 file

# Setting up OpenCore's EFI environment

Setting up OpenCore's EFI environment is simple – all you need to do is mount our EFI system partition. This is automatically made when we format with GUID but is unmounted by default, this is where our friend MountEFI(opens new window) comes in:

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You'll notice that once we open the EFI partition, it's empty. This is where the fun begins.

# Now with all of this done, head to Setting up the EFI to finish up your work

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thinktanker · 4 years ago

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Very Important Things to know about Node.js 15

We all have heard of Node.js, which was first introduced in 2009. Since then, many versions of the platform have been released, and the latest version is Node.js 15. Node.js 14 will be replaced by Node.js 15. However, long-term support will be available for Node.js 14. Innumerable developers and web development organizations use this amazing back-end, open-source, cross-stage JavaScript runtime system. You must hire nodejs developers professionals to leverage the benefits offered by the version.

The best thing about Node.js is that it has a unique event-driven design along with an offbeat IO. As a result, the web application improvement process becomes simple and more streamlined. Many leading brands are adopting the new version of Node.js. There are various improvements and changes that have taken place in Node.js 15 version with better features and attributes. In this article, we will discuss some interesting improvements and features of Node.js 15.

Interesting new features of Node.js 15

Node.js 15 comes with some brilliant new features. Some prominent ones among them include:

Abort controller

An experimental implementation of the Abort Controller can be seen in Node.js 15 version. This is effective in canceling some specific promise-based APIs. This is a worldwide utility class, which is deeply dependent on the web API. With the help of the Abort Controller, web developers will be able to terminate a minimum of one web request prematurely whenever required.

The cancellation feature in the Abort Controller had been discussed for a long, and now it has been implemented. As the feature stabilizes, the list of APIs, which support the abort feature will surely expand.

NPM 7

When it comes to Node.js 15, the most prominent feature that is implemented is that of NPM 7. NPM is regarded as the package manager of JavaScript, making it one of the largest software registries if you did not know. NPM 7 comes with unique features, among which workspace needs special mention. With workspace, the creation and management of NPM packages are supported in a single file system. There have been critical internal alterations in NPM 7, which enhances maintainability and reliability.

Some features of NPM 7 include:

Default peer dependencies

Manual installation of peer dependency for resolving various issues were common in NPM previously. In the current version, the feature is improved as peer conditions are introduced naturally.

Workplaces

Helps in managing different bundles from a singular top-level root bundle. Much awaited component, this comes with the new package-lock.json format. It helps in supporting the automatic installation of peer dependencies and also supports yarn.lock file.

New language features with the help of v8.6

Node.js 15, Node.js’s latest version, comes with V8 JavaScript runtime support. From 8.4, it has been refreshed to 8.6, along with innumerable important highlights and performance upgrades. V8 is the main and primary JavaScript engine on which Node.js runs.

The version V8 engine is bumped by Node.js 15 for moving from 8.4 to 8.6. V8 illustrates language features of JavaScript, which are readily available to developers. Some new dialects in this version will minimize the amount of code that needs to be written and developed. Moreover, the code becomes more intelligible.

N-API Version 7

Changes in Node.js 15 make it easy to assemble, make and uphold local modules, otherwise known as add-ons. Red Hat and IBM are continuous and dedicated supporters of N-API. The latest version of Node.js, which is the Node.js 15has N-API version 7. With the help of this upgradation, extra techniques are available for working with array buffers.

To burn through N-API, one popular approach is that of node-addon-API. Approximately more than 2 million downloads have taken place recently every week for this, which is a respected figure for sure. Precisely, with N-API version 7, stability can be maintained across various Node.js versions and, more importantly, at different compiler levels. To utilize such features, it is necessary to hire the apt nodejs development company.

Throw out unhandled rejections

Node.js 15, the latest version of Node.js, has one amazing change. It is about the management of unhandled rejected promises. In the previous versions, it was seen that a warning was given if a rejected promise was not handled properly and explicitly. In Node.js 15, there is a default mode for unhandled rejection, which is changed for raising some uncaught exception and ends the application.

A warning is currently thrown, which might prove to be a foul surprise in production if Node.js gets updated without knowing about this change. There is a global handler of the unhandled rejection event. By adding this, it is possible to obtain unhandled rejections, and you have the choice of thinking about how you want to continue. The accompanying codes will log the event, and the application will keep running, like all previous Node.js variants.

Experimental support for QUIC protocol (HTTP/3)

In Node.js 15, there is support for QUIC protocol. A UDP-based organization transport convention for HTTP/3, QUIC provides in-built security with TLS 1.3. It is possible to carry out functions like stream control, multiplexing, connection relocation, error adjustment, etc., with this system. Node.js 15 provides experimental support for this work through the QUIC configuration flag.

QUIC is a very useful, exploratory, and vital transport layer network protocol, which Google has planned. It is not only proficient and quick; it is actualized on UDP. QUIC protocol aims to minimize latency when contrasted with TCP. Some additional advantages of QUIC include error correction, flow control, TLS 1.3, and connection migration.

Experimental diagnostics channel module

Another exciting feature of Node.js 15 is that it depicts diagnostics_channel, another trial module. With this module, the publish-subscribe pattern is empowered. Engineers can utilize this pattern to distribute arbitrary information to a specific channel, which various applications or modules can further use. The module is made nonexclusive on purpose so that it can be used in myriad ways. It is possible to import and use the module immediately.

It is expected that more Node.js 15 patches and minor releases will come out in April 2021.

However, after that a new version of Node.js will be seen in the form of Node.js 16. This will be the next LTS release. Till then, developers will be happy using Node.js 15 for its amazing features.

Source:

https://www.thinktanker.io/blog/very-important-things-to-know-about-node-js-15.html

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brtechnosoftteam · 5 years ago

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Node.js 10.0 version with various amazing features

Node.js 10.0, the latest version of Node.js is released and is expected to provide a lot of improvements and also the performance of Node.js 10 is expected to be considerably better than the earlier version. A stable launch of version 10.0 as the seventh release is awaited. By October 2018, Node.js 10.0 will start to function as the LTS (Long Term Support) to the platform and as a result the developers will be able to build up scalable applications. Developers can expect extended as well as sustained support from the LTS lines.

A few facts to remember NodeJS

js is basically a cross platform open-source run-time environment for building web applications like video streaming sites and single-page applications all of which are I/O intensive

js platform is developed on the V8 engine of Chrome JavaScript

js is one among the widely used server-side as well as back-end JavaScript run-time

js is a free back-end platform which is lightweight and highly efficient

js library has a huge collection of different JavaScript modules

Google V8 v6.6 Engine

Node.js 10.0 version comes with Google V8 v6.6 JavaScript Engine. This is indeed an exciting news for developers and other users since Google V8 v6.6 JavaScript Engine is capable of managing with errors to a great extent. N-API is considered as free API module and its operation in the new Node.js version will not be affected by the V8 Engine.

Node.js 4 to be upgraded

Now it is imminent to upgrade Node.js 4 higher version as a result of the release of Node.js version 10.0, there will be no more support for Node.js 4.

Advantage of the new JavaScript language

In the new JavaScript language more mitigations are shipped for the side-channel vulnerabilities in order to secure the information. As a result spilling of information to the unethical form of JavaScript as well as Web Assembly code is effectively prevented. Another advantage is the function.prototype.toString () which will ensure that the accurate code text source slice is returned which includes comments as well as whitespace.

Improved Performance

The async generator and other new features of Node.js 10.0 make it easier for the developers to deal with the codes and now the developers can function almost independently. They are assured of seamless flow of the resources. The new version will be very effective in minimizing errors and getting rid of the blocks that create restrictions. The run-time environment is made more flexible. There will be better connectivity and the options are now streamlined. Now it will be easier for the users to check for errors and avoid loopholes.Advantage of the new JavaScript language

Errors will be tackled more efficiently

Errors in the Node.js platform used to be a great problem for developers. Other than a single string message no other error identifier was available with the earlier versions of Node.js. Hence, whenever there was a change in the program or in the code a string comparison of the error content was necessary. Changes in the text also were delayed due to the string comparison. The developers can make use of the error codes in the latest version to update the text without affecting the applications.

Improved back-end applications due to changes in N-API

N-API is no more in the experimental mode. It will now ensure stability and also will help for different project development so as to facilitate better back-end applications. Now API is independent of the V8 Engine. In future, one need not spend money for maintaining native modules. Upgrading to the latest versions is made easier and solution is provided to the problem of module breakage. The developers and users can easily get the N-API back to the earlier versions 8.x and 6.x. This will enable the users of earlier versions to update the framework easily.

Experimental promise versions of fs functions

Node.js 10.0 version directly provides the experimental version of fs Functions whereas in the case of the earlier versions the developers were required to take additional steps.

More effective solutions to security issues

All JavaScript frameworks are known for their outstanding security features. With every new version the security feature is also updated.

Node.js has been very successful in tackling the various security issues that are looming large over the internet space. The collective work of the newly introduced OpenSSL 1.x team and the Core Infrastructure Initiative team has led to the development of the most effective solutions to the security issues. Their joined efforts enabled them to develop the ChaCha 20 cipher and Polu 1305 authenticator. The encryption of the communications is carried out using the latest architecture.

Improved diagnosis and solution to performance-related problems

Node.js 10.0 version has made the applications more visible and as a result the performance-related issues are sorted out easily. The users can carry out diagnosis in a better way using API since they can run the events off and on at run time.

Improved npm version 6

The upgraded version 6 has brought a lot of improvement in npm with regard to stability, security and performance. Node.js 10.0 version can ship the updated npm version 6.

CONCLUSION

The inclusion of many new features as well as changes by the Node.js team is part of their mission to make the task easier and more comfortable for the back-end developers. The Node.js 10.0 version will be active till April 2021 and the developers will be able to create better web applications with more visibility as well as easy access to errors.

BRTechnosoft is one of the best Node.JS Development Company in India. Hire our dedicated Node.JS developers for development services.

Source: https://brtechnosoft.com/node-js-10-0-version-with-various-amazing-features/

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katyslemon · 5 years ago

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Upgrading Node.js to Latest Version 14. ✪ What’s New in Node.js 14? ✪ How to Upgrade Node Version 14? ✪ Update Node on #Linux Systems ✪ Update Node.js on #Windows and #macOS

#nodejs14 #node #node.js #upgradenode #hiredevelopers #web development #remotework #upgrade #latest version

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t-baba · 5 years ago

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A Beginner’s Guide to npm, the Node Package Manager

Node.js makes it possible to write applications in JavaScript on the server. It’s built on the V8 JavaScript runtime and written in C++ — so it’s fast. Originally, it was intended as a server environment for applications, but developers started using it to create tools to aid them in local task automation. Since then, a whole new ecosystem of Node-based tools (such as Grunt, Gulp and webpack) has evolved to transform the face of front-end development.

To make use of these tools (or packages) in Node.js, we need to be able to install and manage them in a useful way. This is where npm, the Node package manager, comes in. It installs the packages you want to use and provides a useful interface to work with them.

In this guide, we're going to look at the basics of working with npm. We'll show you how to install packages in local and global mode, as well as delete, update and install a certain version of a package. We’ll also show you how to work with package.json to manage a project’s dependencies. If you’re more of a video person, why not sign up for SitePoint Premium and watch our free screencast: What is npm and How Can I Use It?

But before we can start using npm, we first have to install Node.js on our system. Let’s do that now.

Installing Node.js

Head to the Node.js download page and grab the version you need. There are Windows and Mac installers available, as well as pre-compiled Linux binaries and source code. For Linux, you can also install Node via the package manager, as outlined here.

For this tutorial, we’re going to use v12.15.0. At the time of writing, this is the current Long Term Support (LTS) version of Node.

Tip: You might also consider installing Node using a version manager. This negates the permissions issue raised in the next section.

Let’s see where node was installed and check the version:

$ which node /usr/bin/node $ node --version v12.15.0

To verify that your installation was successful, let’s give Node’s REPL a try:

$ node > console.log('Node is running'); Node is running > .help .break Sometimes you get stuck, this gets you out .clear Alias for .break .editor Enter editor mode .exit Exit the repl .help Print this help message .load Load JS from a file into the REPL session .save Save all evaluated commands in this REPL session to a file Press ^C to abort current expression, ^D to exit the repl

The Node.js installation worked, so we can now focus our attention on npm, which was included in the install:

$ which npm /usr/bin/npm $ npm --version 6.13.7

Updating npm

npm, which originally stood for Node Package Manager, is a separate project from Node.js. It tends to be updated more frequently. You can check the latest available npm version on this page. If you realize you have an older version, you can update as follows.

For Linux and Mac users, use the following command:

npm install -g npm@latest

For Windows users, the process might be slightly more complicated. This is what it says on the project's home page:

Many improvements for Windows users have been made in npm 3 - you will have a better experience if you run a recent version of npm. To upgrade, either use Microsoft's upgrade tool, download a new version of Node, or follow the Windows upgrade instructions in the Installing/upgrading npm post.

For most users, the upgrade tool will be the best bet. To use it, you’ll need to open PowerShell as administrator and execute the following command:

Set-ExecutionPolicy Unrestricted -Scope CurrentUser -Force

This will ensure you can execute scripts on your system. Next, you’ll need to install the npm-windows-upgrade tool. After you’ve installed the tool, you need to run it so that it can update npm for you. Do all this within the elevated PowerShell console:

npm install --global --production npm-windows-upgrade npm-windows-upgrade --npm-version latest

Node Packaged Modules

npm can install packages in local or global mode. In local mode, it installs the package in a node_modules folder in your parent working directory. This location is owned by the current user.

If you’re not using a version manager (which you probably should be), global packages are installed in {prefix}/lib/node_modules/, which is owned by root (where {prefix} is usually /usr/ or /usr/local). This means you would have to use sudo to install packages globally, which could cause permission errors when resolving third-party dependencies, as well as being a security concern.

Let’s change that!

Time to manage those packages

Changing the Location of Global Packages

Let’s see what output npm config gives us:

$ npm config list ; cli configs metrics-registry = "https://registry.npmjs.org/" scope = "" user-agent = "npm/6.13.7 node/v12.15.0 linux x64" ; node bin location = /usr/bin/nodejs ; cwd = /home/sitepoint ; HOME = /home/sitepoint ; "npm config ls -l" to show all defaults.

This gives us information about our install. For now, it’s important to get the current global location:

$ npm config get prefix /usr

This is the prefix we want to change, in order to install global packages in our home directory. To do that create a new directory in your home folder:

$ cd ~ && mkdir .node_modules_global $ npm config set prefix=$HOME/.node_modules_global

With this simple configuration change, we’ve altered the location to which global Node packages are installed. This also creates a .npmrc file in our home directory:

$ npm config get prefix /home/sitepoint/.node_modules_global $ cat .npmrc prefix=/home/sitepoint/.node_modules_global

We still have npm installed in a location owned by root. But because we changed our global package location, we can take advantage of that. We need to install npm again, but this time in the new, user-owned location. This will also install the latest version of npm:

npm install npm@latest -g

Finally, we need to add .node_modules_global/bin to our $PATH environment variable, so that we can run global packages from the command line. Do this by appending the following line to your .profile, .bash_profileor .bashrc and restarting your terminal:

export PATH="$HOME/.node_modules_global/bin:$PATH"

Now our .node_modules_global/bin will be found first and the correct version of npm will be used:

$ which npm /home/sitepoint/.node_modules_global/bin/npm $ npm --version 6.13.7

Tip: you can avoid all of this if you use a Node version manager. Check out this tutorial to find out how: Installing Multiple Versions of Node.js Using nvm.

Installing Packages in Global Mode

At the moment, we only have one package installed globally — the npm package itself. So let’s change that and install UglifyJS (a JavaScript minification tool). We use the --global flag, but this can be abbreviated to -g:

$ npm install uglify-js --global /home/sitepoint/.node_modules_global/bin/uglifyjs -> /home/sitepoint/.node_modules_global/lib/node_modules/uglify-js/bin/uglifyjs + [email protected] added 3 packages from 38 contributors in 0.259s

As you can see from the output, additional packages are installed. These are UglifyJS’s dependencies.

Listing Global Packages

We can list the global packages we've installed with the npm list command:

$ npm list --global home/sitepoint/.node_modules_global/lib ├─┬ [email protected] │ ├── [email protected] │ ├── [email protected] │ ├── [email protected] │ ├── [email protected] │ ├── [email protected] .................... └─┬ [email protected] ├── [email protected] └── [email protected]

The output, however, is rather verbose. We can change that with the --depth=0 option:

$ npm list -g --depth=0 /home/sitepoint/.node_modules_global/lib ├── [email protected] └── [email protected]

That’s better; now we see just the packages we’ve installed along with their version numbers.

Any packages installed globally will become available from the command line. For example, here’s how you would use the Uglify package to minify example.js into example.min.js:

$ uglifyjs example.js -o example.min.js

Installing Packages in Local Mode

When you install packages locally, you normally do so using a package.json file. Let’s go ahead and create one:

$ mkdir project && cd project $ npm init package name: (project) version: (1.0.0) description: Demo of package.json entry point: (index.js) test command: git repository: keywords: author: license: (ISC)

Press Return to accept the defaults, then press it again to confirm your choices. This will create a package.json file at the root of the project:

{ "name": "project", "version": "1.0.0", "description": "", "main": "index.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1" }, "author": "", "license": "ISC" }

Tip: If you want a quicker way to generate a package.json file use npm init --y.

The fields are hopefully pretty self-explanatory, with the exception of main and scripts. The main field is the primary entry point to your program, and the scripts field lets you specify script commands that are run at various times in the life cycle of your package. We can leave these as they are for now, but if you’d like to find out more, see the package.json documentation on npm and this article on using npm as a build tool.

Now let’s try and install Underscore:

$ npm install underscore npm notice created a lockfile as package-lock.json. You should commit this file. npm WARN [email protected] No repository field. + [email protected] added 1 package from 1 contributor and audited 1 package in 0.412s found 0 vulnerabilities

Note that a lockfile is created. We’ll be coming back to this later.

Now if we have a look in package.json, we’ll see that a dependencies field has been added:

{ ... "dependencies": { "underscore": "^1.9.2" } }

The post A Beginner’s Guide to npm, the Node Package Manager appeared first on SitePoint.

by Michael Wanyoike via SitePoint https://ift.tt/2Q0Ku7Y

#CSS3 #HTML5 Branding #HTML5 Weekly #HTMLl5 demos #Javascript Branding #Javascript Weekly #Mobile #Mo

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mobilecoderz-technologies · 6 years ago

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4 Aspects of Node.Js Development to Empower Enterprise-level Firms

When it comes to discussing the unmatched potential of the popular programming languages, Node is in the talks of the town since the day it arrived in the industry. With a long list of power-packed frameworks & languages to consider for some distinctive benefits, the idea of Node.Js development takes over every techie’s mind and there are many reasons for it.

Since the modern world of the web revolves around the core components of JavaScript, it is hard to restrict yourself from leveraging the features of frameworks & libraries offered by this programming language for creating highly interactive & engaging solutions. However, it is been a while since JavaScript brought a platform with backend support to compete with other preferred programming languages. Now Node takes a lead in the JS block as the majority of enterprises level organizations are embracing its utility in custom Node.Js development.

Overview of Node.Js development

Development using Node.Js express framework is the latest trend and you just can’t ignore this fact that surprisingly, over 43% of Node.Js programmers claim to have used it for creating enterprise apps. Why so? Before elaborating the answer, let’s have a quick intro of Node.Js and some considerable advantages of using it for cross-platform development:

Node.Js serves a JS runtime environment that enables functionality to construct an app and run it smoothly. It offers a light, flexible, & cross-platform way to create codes. It works on an event-driven I/O model that encourages the possibilities for scalability of network application with better efficiency. Today, Node.JS rules over other JavaScript-based frameworks with a billion download. From real-time application to the Internet of Things, microservices, & more, Node.Js development services are gaining traction with these important advantages:

Faster development of real-time apps like chat or gaming

Simplifies coding in JavaScript for the client as well as server-side

Speeds up the development process to raise the efficiency of Node.Js developers alongside eliminating the gaps b/w frontend and backend team.

Serves multiple tools & modules with the availability of NPM (Node Package Manager) resulting in enhanced productivity.

Executes codes faster than other programming languages

Goes well with microservices to act as the trendiest add-on to popular enterprise apps.

Developers love using Node.Js for many reasons and here are they:

Speed & scalability: Node-Js is based on an event-driven & single-threaded architecture that allows developers to work simultaneously on multiple connections. Using this programming language means you can handle thousands of concurrent connections at once. One can easily monitor a single thread using event loop & callbacks for I/O operations. Moreover, it combines powerful tools to make it easier to operate, optimize, & deploy apps after Node.Js development.

Creating cross-functional teams: Though Node is based on JavaScript, both frontend and backend development team can work in parallel while using programming language for development. Every full-stack developer skilled in JavaScript is comfortable using Node to focus on the client’s side as well as server-side. In this way, Node.Js adds on to the efficiency of developers not only by simplifying the process but also by speeding up the development lifecycle of an app including code writing, testing, hosting, deployment, & maintenance and support.

Extended support: As per the latest survey report on Node.Js users, more than 61% of programmers admit using this language due to its long term support. In simply means that you can simply upgrade to the new versions of Node while getting into the predefined route of mobile app development.

Supports cross-platform development: The combination of Node.Js with platforms such as Electron or NW.js brings a simplified way to build cross-platform desktop apps as you can use the existing codes from a web app derived from macOS, Windows, & Linux. In addition to this, the same web app development team can create a desktop app using Node.Js framework with a slight knowledge of C#, Objective-C, & other languages.

Even though Ruby on Rails is on everyone’s mind, JavaScript-based frameworks cover up a huge part of web development and that’s why the majority of Node.Js development companies make the best of it.

#custom Node.Js development #Node.Js express framework #Node.Js development services #Node.Js developers #Node.Js development #Node.Js framework #Node.Js development companies

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