What is Robots Exclusion Protocol?Robots Exclusion Protocol is a convention where directives are written with an objective to restrict or channel web crawlers to access parts of website. A part of website may be publicly visible and rest is private for all or some web crawlers.The standard was proposed by Martijn Koster.The robots.txt file need
Read morePopular Search Index bots and their User agents that can be used in robots.txtCrawlerUser AgentsDescription Googlebot(Web) Googlebot Generic Google bot crawler for web searchGooglebot News Googlebot-News For Google NewsGooglebot Images Googlebot-Image For Images SearchGooglebot videoGooglebot-Video For Video SearchGooglebot mobile Googlebot-Mobile For Google Mobile web search resultsGoogle Mobile AdSense Mediapartners-Google Mediapartners Google AdSense Mediapartners-Google Mediapartners Google AdsBot landing page quality check AdsBot-Google Only visits landing pages used
Read moreCSS selectors are patterns or specific elements you want to select and apply styles to it. Here are 2 not most commonly used but useful selectors.There have been many scenarios where you want to checkif an element is the only child of a parent[crayon-6647a39e0a32f711579580/]Click here for demo. only-child selector would
Read moreSchema.org: is a collaboration between Bing, Google, Yahoo and Yandex to provide for a set of markups that will be used by search engines to fetch rich and relevant search results.You can use rich snippet tool to see what data has been extracted from your page and what will appear
Read moreEvent bubbling and event capturing are two ways of event propagation in DOM structure.Ex. There are two HTML elements embedded in one another as:Event bubbling: the event is captured in span element first and then in div.Event Capturing: the event is captured in div element first and then in span.Browser Support: In older
Read moreMany times we need to change the way browsers render scrollbars, although we don’t find enough browsers that support it( :( ) not even vendor-prefixed properties except for Webkit.Webkit supports styling your scrollbar as required, and yes this means you could only view these custom scrollbars in Safari and Chrome
Read moreWhat is the box model?A HTML element is rendered as a rectangle box. The box has attributes viz. width, padding, height, margin and border.The HTML element is rendered differently in different browsers.For example:[crayon-6647a39e0ae77602414623/]Guess the computed width of the div.60em80emBoth are correct answers. How?IE: Trident (layout engine for IE) renders the
Read moreWhat are NOODP and NOYDIR meta tags ?[crayon-6647a39e0b0b4599979815/]These meta tags are seen in many pages, but what are these used for and why. NOODP: No Open Directory Project. Do not index in Open Directory Project. NOYDIR: No Yahoo Directory. Do not index in Yahoo Directory ODP: Open Directory Project also know
Read moreHow to use border radius for IE-8?HTMLWe can use the ie-css3 file which is a .htc(HTML Component file) file. Just put the file in root folder and can be used as follows:[crayon-6647a39e0b317047190819/] Note: Please provide the relative/ absolute path to ie-css3.htc file.You can view a demo here. WordPress Using the above solution in
Read moreDimension and Metrics allows you to analyze how users are interacting with content on your site or app. For example in a CMS or an android application, if you want to track user specific visits and hits over a particular page/ button/ level in a game.Example: Lets implement dimensions and metrics in
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