How to become a Node.js Developer?

Introduction

Node.js could be a platform designed on Chrome’s JavaScript runtime for simply building quick and scalable network applications. Node.js uses an event-driven, non-blocking I/O model that creates it light-weight and efficient, excellent for data-intensive time period applications that run across distributed devices.
Node.js is an open-source, cross-platform runtime setting for developing server-side and networking applications. Node.js applications are written in JavaScript and maybe run among the Node.js runtime on OS X, Microsoft Windows, and Linux.

Node.js additionally provides an expensive library of assorted JavaScript modules that simplifies the event of internet applications victimization Node.js to a good extent.


What is Node.js?

Node. js could be a platform designed on Chrome’s JavaScript runtime for simply building quick and scalable network applications. Node. js uses an event-driven, non-blocking I/O model that creates it light-weight and efficient, excellent for data-intensive time period applications that run across distributed devices.

How does Node.js work?

First of all just like other languages node comes with packages and modules. These are libraries of functions that we can import from npm (node package manager) into our code and utilize. Node. js is that the JavaScript runtime surroundings that’s supported Google’s V8 Engine for example with the assistance of Node. js we are able to run the JavaScript outside of the browser js is that it’s single-threaded, supported event-driven design, and non-blocking supported the I/O model.

Why is node js so popular?

Node. js will handle several concurrent requests. this is often the most reason it quickly became popular among developers and huge corporations. It will handle several simultaneous requests while not straining the server.

Role of a Node.js developer:

A Node. js developer is answerable for writing server-side internet application logic in JavaScript and/or variants of it, like CoffeeScript, IcedCoffeeScript, etc, js developer is answerable for writing server-side internet application logic in JavaScript and/or variants of it, like CoffeeScript, IcedCoffeeScript, etc.

Node.js Developer duties:

  • Work as part of a team developing applications and services using Agile development methods.
  • Contribute to team and organizational improvements in process and infrastructure.
  • Build customer-facing UI and back-end services for payment processing administration and management.
  • Code, test, and operate a node. js-based services.
  • Effectively use tools and ingenuity to identify and fix defects before they become a problem.

Responsibilities of Node.js Developers:

Features of Node.js:
Following are some of the important features that make Node.js the first choice of software architects.

Asynchronous and Event-Driven − All Apis of the Node.js library are asynchronous, that is, non-blocking. It primarily means that a Node. the js-based server never waits for an API to come back with the information. The server moves to the next API when calling it and a notification mechanism of Events of Node.js helps the server to induce a response from the previous API decision.

Very Fast − Being built on Google Chrome’s V8 JavaScript Engine, the Node.js library is very fast in code execution.

Single-Threaded but Highly Scalable − Node.js uses a single-threaded model with event looping. The event mechanism helps the server to reply in a non-blocking way and makes the server extremely scalable as against ancient servers that produce restricted threads to handle requests. Node.js uses a single-threaded program and therefore the same program will offer service to a far larger range of requests than ancient servers like Apache HTTP Server.

No Buffering − Node.js applications never buffer any data. These applications simply output the data in chunks.

License − Node.js is released under the MIT license.

The Benefits of Node.js:

  • Better efficiency and overall developer productivity
  • Code sharing and reuse
  • Speed and performance
  • Easy knowledge sharing within a team
  • A huge number of free tools

What is the scope of node JS?

Node.js could be a runtime environment that permits you to write down server-side applications in JavaScript. PHP could be a server-side language. attributable to that, you’ll get to try PHP with a frontend language, sometimes a mix of HTML, CSS, and JavaScript, to make full-stack internet apps.

Node.js Developer Course:

Js Developer Course covers the basics of Node before diving deep into nice tools like specific, Mongoose, and MongoDB. the whole course is predicated around one goal: Turning you into an expert Node developer capable of developing, testing, and deploying real-world production applications.

Node.js Developer requirements and qualifications:

  • Previous working experience as a Node.js Developer for (x) years.
  • BA in computer science or similar relevant field.
  • In-depth knowledge of Node.js.
  • Hands-on experience with HTML, CSS, and AJAX.
  • Development experience designing object-oriented JavaScript and SVG.
  • Applicable knowledge of web libraries and frameworks such as AngularJS, Polymer, and Closure.
  • Familiarity with the whole web stack, including protocols and web server optimization techniques.
  • Strong analytical skills and problem-solving aptitude.
  • Attention to detail.

Conclusion

Node.js is, while not a doubt, one of all the additional interesting technologies in use nowadays, and it’s full-grown into one of all the foremost popular platforms used for internet applications, services, and desktop apps. It’s my hope that when looking at this course, you currently have a solid foundation to begin writing your own Node applications.

If you wanna learn, and from all of us here at DevOpsSchool, thank you for watching!

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How many create cookies in JavaScript?

JavaScript Cookies

Cookies are exposed as the cookie property of the Document object. This property is both readable and writeable.

You can see Cookies in Google Chrome by following chrome://settings/content/cookies

Creating Cookies

When you assign a string to document.cookie, the browser parses it as a cookie and adds it to its list of cookies. There are several parts to each cookies, many of them optional.

Syntax: –

document.cookie = “name=value”;
document.cookie = “name=value; expires=date; domain=domain; path=path; secure”;
document.cookie = “name=value; max-age=inSecond; domain=domain; path=path; secure”;

Ex:-

Creating Cookies

Optional Cookies Attribute:-

max-age
expires
domain
path
secure

Whenever you omit the optional cookie fields, the browser fills them in automatically with reasonable defaults.

max-age

It is used to create persistent cookies. It is supported by all modern browsers except IE.

Type of cookies: –

  • Session Cookies – Cookies that are set without the expires/max-age field are called session cookies. It is destroyed when the user quits the browser.
  • Persistent Cookies – The browser keeps it up until their expiration date is reached.

Ex:-

expires

It is used to create persistent cookies.

Type of cookies: –

  • Session Cookies – Cookies that are set without the expires/max-age field are called session cookies. It is destroyed when the user quits the browser.
  • Persistent Cookies – The browser keeps it up until their expiration date is reached.

Ex:-

document.cookie = “username=devops; expires=Monday, 3-Sep-2018 09:00:00 UTC”;

domain

It specifies the domain for which the cookie is valid. If not specified, this defaults to the host portion of the current document location. If a domain is specified, subdomains are always included.

Ex: –

path

Path can be / (root) or /mydir (directory). If not specified, defaults to the current path of the current document location, as well as its descendants.

Ex: – document.cookie = “username=devops; path=/”;

Ex: – document.cookie = “username=devops; path=/home”;

secure

Cookie to only be transmitted over secure protocol as https. Before Chrome 52, this flag could appear with cookies from http domains.

Ex: – document.cookie = “username=devops; secure”;

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How to Implement Google reCaptcha in bootstrap 4 Form using PHP?

First Go to in this website and create a Account using your gmail account and generate Secret Key and Site Key.

Click Here

After that create a form as below code:-

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SEO tools and Reference

http://www.wordtracker.com/
www.wordtracker.com
www.w3.org for validation
www.seotoolset.com
www.marketleap.com for 3 main tool sets.
www.bebuildpages.com
www.dmoz.org ; to submit the site to directory.
www.searchenginewatch.com
www.bruceclay.com
www.dogpile.com
AWR(advance web ranking) software.
http://www.keyrow.com
 http://www.webseoanalytics.com
http://www.pagerank.net/seo-tools/
http://www.seocentro.com/tools/search-engines/keyword-position.html
http://www.searchenginejournal.com/
http://www.backlinkwatch.com
http://www.vaughns-1-pagers.com/internet/google-ranking-factors.htm
http://searchenginewatch.com/
http://computer.howstuffworks.com/search-engine1.htm
http://computer.howstuffworks.com/search-engine.htm
http://websearch.about.com/library/cheatsheet/blgooglecheatsheet.htm
http://websearch.about.com/library/cheatsheet/blyahoocheatsheet.htm
Seomoz.org
http://www.topseos.com
http://www.digitalpoint.com/tools/adsense-charts/
http://searchengineland.com/
http://www.google.com/sitemap.html
http://www.topseos.com/search-engine-marketing-tools
http://linkmonitor.submitexpress.com/index.php
http://linkcounter.submitexpress.com/
http://www.smartpagerank.com/
http://www.prchecker.info
http://www.prcheckingtool.com/
http://www.submitexpress.com/linkpop/
http://www.seocompany.ca/tool/search-directory/
forums.digitalpoint.com
http://www.webmasterworld.com/
http://www.smartpagerank.com/pagerank-backlinks.php
www.websitegrader.com ;
Google Keyword Tool
Keywordspy.com
Internet Business Promoter (IBP)
SEOMoz
SEO Quake
Firebug
Web Developer
Alexa Sparky
Google Keyword Tool
Keywordspy.com
Internet Business Promoter (IBP)
SEOMoz
SEO Quake
Firebug
Web Developer
Alexa Sparky
Google Webmaster Tools
GoogleWebmasterHelp’s Channel on YouTube
Matt Cutts – posts and videos
SEOmoz – blog and tools
SearchEngineLand
Local Search – David Mihm
Local Search/Technical – Mike Blumenthal
SEO/Technical – Stephan Spencer
Tools to check popularity of keyword searches
Overture’s Keyword Selector Tool
http://inventory.overture.com
WordTracker.com
Trellian’s KeywordDiscovery.com
Google’s Keyword Tool https://adwords.google.com/select/KeywordToolExternal
Google Trends
www.google.com/trends
Google Suggest
www.google.com/webhp?complete=1&hl=en
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20 Great Google Secrets

http://www.pcmag.com/article2/0,4149,1306756,00.asp

 

excl.gif No Active Links, Read the Rules – Edit by Ninja excl.gif

 

Google is clearly the best general-purpose search engine on the Web (see www.pcmag.com/searchengines

 

But most people don’t use it to its best advantage. Do you just plug in a keyword or two and hope for the best? That may be the quickest way to search, but with more than 3 billion pages in Google’s index, it’s still a struggle to pare results to a manageable number.

 

But Google is an remarkably powerful tool that can ease and enhance your Internet exploration. Google’s search options go beyond simple keywords, the Web, and even its own programmers. Let’s look at some of Google’s lesser-known options.

 

Syntax Search Tricks

 

Using a special syntax is a way to tell Google that you want to restrict your searches to certain elements or characteristics of Web pages. Google has a fairly complete list of its syntax elements at

 

www.google.com/help/operators.html

 

. Here are some advanced operators that can help narrow down your search results.

 

Intitle: at the beginning of a query word or phrase (intitle:”Three Blind Mice”) restricts your search results to just the titles of Web pages.

 

Intext: does the opposite of intitle:, searching only the body text, ignoring titles, links, and so forth. Intext: is perfect when what you’re searching for might commonly appear in URLs. If you’re looking for the term HTML, for example, and you don’t want to get results such as

 

www.mysite.com/index.html

 

, you can enter intext:html.

 

Link: lets you see which pages are linking to your Web page or to another page you’re interested in. For example, try typing in

 

link:http://www.pcmag.com

 

Try using site: (which restricts results to top-level domains) with intitle: to find certain types of pages. For example, get scholarly pages about Mark Twain by searching for intitle:”Mark Twain”site:edu. Experiment with mixing various elements; you’ll develop several strategies for finding the stuff you want more effectively. The site: command is very helpful as an alternative to the mediocre search engines built into many sites.

 

Swiss Army Google

 

Google has a number of services that can help you accomplish tasks you may never have thought to use Google for. For example, the new calculator feature

 

(www.google.com/help/features.html#calculator)

 

lets you do both math and a variety of conversions from the search box. For extra fun, try the query “Answer to life the universe and everything.”

 

Let Google help you figure out whether you’ve got the right spelling—and the right word—for your search. Enter a misspelled word or phrase into the query box (try “thre blund mise”) and Google may suggest a proper spelling. This doesn’t always succeed; it works best when the word you’re searching for can be found in a dictionary. Once you search for a properly spelled word, look at the results page, which repeats your query. (If you’re searching for “three blind mice,” underneath the search window will appear a statement such as Searched the web for “three blind mice.”) You’ll discover that you can click on each word in your search phrase and get a definition from a dictionary.

 

Suppose you want to contact someone and don’t have his phone number handy. Google can help you with that, too. Just enter a name, city, and state. (The city is optional, but you must enter a state.) If a phone number matches the listing, you’ll see it at the top of the search results along with a map link to the address. If you’d rather restrict your results, use rphonebook: for residential listings or bphonebook: for business listings. If you’d rather use a search form for business phone listings, try Yellow Search

 

(www.buzztoolbox.com/google/yellowsearch.shtml).

 

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