HTML

localStorage and sessionStorage is extend HTML5 Web Storage. localStorage, sessionStorage and cookies are all client storage solutions. It store data locally within the clients browser. Cookies was the old method to store data locally before HTML5, HTML5 localStorage is more secure and store large amounts of data locally. You can improve your Website Performance using localStorage.

HTML5 localStorage has two objects for storing data locally

window.localStorage - Stores data with no expiry date

Responsive Website/Mobile App is very essential part of current Business trend. All top level social media and eCommerce Companies has Mobile Websites. It can be Mobile App or Responsive Website. The biggest advantages of Responsive Website is single website can use in multiple devices like Desktop, Mobile, Tablets etc. But in Mobile App you should develop application for each Mobile platform iOS, Android etc.

Web design method has changed a lot over the last few years and gaining responsive web design popularity. Now a days everyone is looking for responsive website, Actually what you mean by responsive website? what you know about responsive website? and Why responsive website?

Bootstrap is open source and most popular front-end framework for developing responsive, mobile first projects on the web. It's hosted, developed, and maintained on GitHub.

Bootstrap have responsive grids and many components to build a responsive website quickly. Boostrap has much reusable components built to provide iconography, dropdowns, input groups, tootip, navigation, alerts, and much more. By default Boostrap has awesome custom jQuery plugins and it's very easy include all, or one by one.

Conditional comments allow special syntax constructions for checking the IE version and are proprietary to Internet Explorer for Windows. A conditional comment is an HTML element that, in IE may conditionally be read, but, to all other browsers looks like an HTML comment and is ignored.

Dropdown menu going "behind" a flash movie, or staying on top of a lightbox layover. You have a CSS based drop-down menu in your navigation and a flash element near it the menus may get “hidden” behind the flash object.

To avoid this we can use WMODE:

WMODE is the Window Mode setting for Flash/SWF. Its possible values are "window", "opaque" or "transparent".

Comments are piece of code which is ignored by any web browser. It is good practice to comment your code, especially in complex documents, to indicate sections of a document, and any other notes to anyone looking at the code. Comments help you and others understand your code.

<div id="header">
   <p>Stuff <p>
</div> <!-- END div-header -->

The DIV movement of getting away from table-based design taught us that tables should be used only when you're presenting a table of data on your website, yet no CSS selector/rule was created to allow us to shade alternate rows a different color.

tr:nth-child(odd)   { background-color:#eee; }
tr:nth-child(even) { background-color:#fff; }

Every piece of text you have ever seen on your screen, that actually stored in a particular character encoding. There are hundreds of different character encodings, some optimized for particular languages like Russian or Chinese or English, and others that can be used for multiple languages. Roughly speaking, the character encoding provides a mapping between the stuff you see on your screen and the stuff your computer actually stores in memory and on disk.

The DOCTYPE declaration, which should be the first item to appear in the source mark-up of any web page, is an instruction to the web browser that identifies the version of the mark-up language in which the page is written. It refers to a known Document Type Definition, or DTD for short. The DTD sets out the rules and grammar for that flavour of mark-up, enabling the browser to render the content accordingly.

HTML 5