Carmen  Grimes

Carmen Grimes

1603677960

[Toy Browser] HTML Parsing and CSS Computing

Introduction: [Toy Browser] Introduction

Previous article: [Toy Browser] HTTP Request and Response Parse

**Keywords: **HTML, CSS, DOM Tree, Finite-state machine

In previous article, toy browser can send a request to the server, receive its response, and parse the response. Now, HTML file is extracted. Next step, we need to create a DOM Tree by parsing HTML. It’s the most tricky and interesting part of toy browser. The codes of HTML Parser will help you understand it. In general, the HTML Parser does following things in the order:

  1. parse HTML character by character
  2. tokenize HTML tag by tag
  3. create the nodes of DOM Tree from the tokens, and mount the nodes on the tree
  4. compute CSS rules and apply them on the nodes of the DOM Tree

HTML Parse

As parsing response and chunked response body, our old friend, Finite-state machine will help us parsing HTML. Different from the previous tasks, HTML is much more complicated. Fortunately, whatwg.org has defined all the states for us (check here, tokenization). Unfortunately, there are 80 states ! To make the toy browser simple, I chose some of the states.

  • tagOpen, tagName, endTagOpen
  • beforeAttributeName, afterAttributeName, attributeName
  • beforeAttributeValue, doubleQuotedAttributeValue, singleQuotedAttributeValue, UnquotedAttributeValue, afterQuotedAttributeValue
  • selfClosingStartTag
  • data, EOF

Image for post

Finite-states machine for parsing HTML of toy browser

#html #html-parsing #css

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[Toy Browser] HTML Parsing and CSS Computing
Carmen  Grimes

Carmen Grimes

1603677960

[Toy Browser] HTML Parsing and CSS Computing

Introduction: [Toy Browser] Introduction

Previous article: [Toy Browser] HTTP Request and Response Parse

**Keywords: **HTML, CSS, DOM Tree, Finite-state machine

In previous article, toy browser can send a request to the server, receive its response, and parse the response. Now, HTML file is extracted. Next step, we need to create a DOM Tree by parsing HTML. It’s the most tricky and interesting part of toy browser. The codes of HTML Parser will help you understand it. In general, the HTML Parser does following things in the order:

  1. parse HTML character by character
  2. tokenize HTML tag by tag
  3. create the nodes of DOM Tree from the tokens, and mount the nodes on the tree
  4. compute CSS rules and apply them on the nodes of the DOM Tree

HTML Parse

As parsing response and chunked response body, our old friend, Finite-state machine will help us parsing HTML. Different from the previous tasks, HTML is much more complicated. Fortunately, whatwg.org has defined all the states for us (check here, tokenization). Unfortunately, there are 80 states ! To make the toy browser simple, I chose some of the states.

  • tagOpen, tagName, endTagOpen
  • beforeAttributeName, afterAttributeName, attributeName
  • beforeAttributeValue, doubleQuotedAttributeValue, singleQuotedAttributeValue, UnquotedAttributeValue, afterQuotedAttributeValue
  • selfClosingStartTag
  • data, EOF

Image for post

Finite-states machine for parsing HTML of toy browser

#html #html-parsing #css

anita maity

anita maity

1618667723

Sidebar Menu Using Only HTML and CSS | Side Navigation Bar

how to create a Sidebar Menu using HTML and CSS only. Previously I have shared a Responsive Navigation Menu Bar using HTML & CSS only, now it’s time to create a Side Navigation Menu Bar that slides from the left or right side.

Demo

#sidebar menu using html css #side navigation menu html css #css side navigation menu bar #,pure css sidebar menu #side menu bar html css #side menu bar using html css

Alisha  Larkin

Alisha Larkin

1617789060

HTML Tutorial For Beginners

The prospect of learning HTML can seem confusing at first: where to begin, what to learn, the best ways to learn — it can be difficult to get started. In this article, we’ll explore the best ways for learning HTML to assist you on your programming journey.

What is HTML?

Hypertext Markup Language (HTML) is the standard markup language for documents meant to be displayed in a web browser. Along with Cascading Style Sheets (CSS) and JavaScript, HTML completes the trio of essential tools used in creating modern web documents.

HTML provides the structure of a webpage, from the header and footer sections to paragraphs of text, videos, and images. CSS allows you to set the visual properties of different HTML elements, like changing colors, setting the order of blocks on the screen, and defining which elements to display. JavaScript automates changes to HTML and CSS, for example, making the font larger in a paragraph when a user clicks a button on the page.

#html #html-css #html-fundamentals #learning-html #html-css-basics #html-templates

anita maity

anita maity

1621077133

Responsive Footer Design using HTML, CSS & Bootstrap

Hello Readers, welcome to my other blog, today in this blog I’m going to create a Responsive Footer by using HTML & CSS only. Earlier I have shared How to create a Responsive Navigation Menu and now it’s time to create a footer section.

As you can see on the image which is given on the webpage. There are various important topics there like About us, Our services and subscribes, some social media icons, and a contact section for easy connection. I want to tell you that it is fully responsive. Responsive means this program is fit in all screen devices like tablet, small screen laptop, or mobile devices.

Live Demo


#responsive footer html css template #footer design in html #simple footer html css code #simple responsive footer codepen #responsive footer code in html and css #responsive footer html css codepen

Alayna  Rippin

Alayna Rippin

1603188000

Creating a CSS Visual Cheatsheet

The other day one of our students asked about possibility of having a CSS cheatsheet to help to decide on the best suited approach when doing this or that layout.

This evolved into the idea of making a visual CSS cheatsheet with all (most) of the common patterns we see everyday and one of the best possible conceptual implementation for them.

In the end any layout could and should be split into parts/blocks and we see every block separately.

Here is our first take on that and we would be happy to keep extending it to help us all.

Please, send you suggestions in the comments in community or via gitlab for the repeated CSS patterns with your favourite implementation for that so that we will all together make this as useful as it can be.

#css #css3 #cascading-style-sheets #web-development #html-css #css-grids #learning-css #html-css-basics