"Mr Branding" is a blog based on RSS for everything related to website branding and website design, it collects its posts from many sites in order to facilitate the updating to the latest technology.
To suggest any source, please contact me: Taha.baba@consultant.com
‘Cvio’ is a modern long-scrolling CV/Resume WordPress theme with a lovely dark color scheme. Highlight features include an introduction full width background image with foreground typewriter effect text, CV-style bio, services, testimonial slider, client logos and a beautiful image portfolio with Lightbox browsing functionality. There are dozens of sections to add and remove but featured before is an arrangement even fit for a full online portfolio website.
Mobiles are constantly under threat as some of the apps are hidden but stealing data from the devices in background, revealed a security firm report, McAfee. Chief scientist, Raj Samani, who is also associated with McAfee, wrote the Q1 2020 McAfee Mobile Threat Report saying around 50 percent of...
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Long-scrolling One Page portfolio for designer Chethan KVS aka Design Pilot on YouTube. The dark-schemed portfolio was built using Webflow and features a fun colorful gradient header progress bar as you scroll.
Want to create Instagram Stories ads but don’t know where to start? Wondering how to make attractive Stories ads without a design background? In this article, you’ll discover how to create, set up, and run an Instagram Stories ad in Ads Manager. What Makes an Effective Instagram Stories Ad First, let’s talk about the differences […]
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.
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:
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 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:
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
+ uglify-js@3.7.7
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:
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
├── npm@6.13.7
└── uglify-js@3.7.7
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:
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.
$ npm install underscore
npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN project@1.0.0 No repository field.
+ underscore@1.9.2
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:
The recommendation engine of YouTube is one of the major sources of increasing views and watch time with its suggested content. The algorithm of platform identifies and recommends which content will be suitable for certain users but the conspiracy content also had been taking its place in between....
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