Sunday 26 January 2014

CSS Score

We all know that when many conflict css properties can be applied for one web element, it is by specification that the more specific properties will be applied. However, specific is an abstract word. Hence, it is better that we know about css score, or how browser choose which properties to override.

Browser categorize css to 4 categories with the specificity from high to low as:

1/ Style Attribute:  <li style="color:white"/>

2/ ID: #some_id{ color: red;}

3/ Class, pseudo class, attribute: .some_class {color:green;}

4/ Elements: li {color:black;}

From W3C recommendation, the result of this calculation takes the form of four comma-separated values, a,b,c,d,1 where the values in column “a” are the most important and those in column “d” are least important. A selector’s specificity is calculated as follows:

  • To calculate a, count 1 if the declaration is from a style attribute rather than a rule with a selector (an inline style), 0 otherwise.
  • To calculate b, count the number of ID attributes in the selector.
  • To calculate c, count the number of other attributes and pseudo-classes in the selector.
  • To calculate d, count the number of element names and pseudo-elements in the selector.
Here is one example using this rule:

body#home div#warning p.message --> 0, 2, 1, 3

Please notice the comma ',' in the css score, it is there to remind us that the score b, c, d can be equal or bigger than 10. Still, the rule to compare is left to right.

9 comments:


  1. Permainan tembak ikan adalah permainan yang paling rame orang mainkan, apalagi jika pelayanannya yang sangat memuaskan bagi anda tentunya kalian pasti akan merasa sangat puas juga kan ?, bagi kalian yang sangat menyukai permainan tembak ikan bisa datang ke situs kami :)

    https://www.aplikasijoker123.org/

    https://www.aplikasijoker123.org/daftar-akun-slot-joker123/

    https://www.aplikasijoker123.org/login-joker388-slot/

    https://www.aplikasijoker123.org/joker123-deposit-pulsa/

    https://www.aplikasijoker123.org/download-joker388-apk/

    https://www.aplikasijoker123.org/link-alternatif-joker123/

    ReplyDelete
  2. A Chatbot Development is a product program for reproducing wise discussions with human utilizing rules or man-made brainpower. Clients connect with the Chatbot development service by means of conversational interface through composed or spoken content. Chatbots can live in informing stages like Slack, Facebook Messenger bot developer and Telegram and fill some needs – requesting items, thinking about climate and dealing with your fund in addition to other things. As a Chatbot development company advancement organization our competency let you find happiness in the hereafter by taking care of clients all the more intelligently to accomplish wanted outcome. As a Chatbot companies we can streamline a large portion of your dreary undertakings, for example, voice bot advancement and client service, online business advices and so on

    ReplyDelete
  3. Nice post, you provided a valuable information, keep going. امیر تتلو

    مهدی جهانی

    ReplyDelete
  4. Howdy! I simply would like to give a huge thumbs up for the good data you have here on this post. I will probably be coming again to your weblog for more soon. Unique Dofollow Backlinks

    ReplyDelete