Html css books pdf download

Three values define first to [top] , then to [left-and-right] and third to [bottom]. If you set each side using unique four values , it will start applying clockwise to [top], [right, bottom ] and [left ]. Use shortcuts to make your coding simpler. When the value is set as a percentage, it is relevant to the [width] of an element.

Keep in mind, the total breadth of the element corresponds to the width property plus the width of any padding area. In light of this, the width is recalculated each time the padding is adjusted. Unlike margin, any padding can have a background color or image.

The color of the padding area is defined via a [background] property. In case the element has a background color, the padding will inherit that color. Thus, if you need your background color to continue on into the space you design, the background will continue on behind the padding. Image resolution is the number of detail an image holds. The term applies to raster digital images. Higher resolution means more image detail. A raster image is an image consisting of the array of pixels.

A pixel is the basic element of the two-dimensional digital image. At the same time, a pixel is also the physical element of the display matrix. In the raster format images are displayed on the most of the image output devices: monitors, printers, cell phones, etc. The width and height of the image in pixels are the image size. And the number of pixels per inch PPI is the resolution of the image. The higher is the resolution, the more pixels are located in one inch.

And the smaller a single one will be. Thus, the more precise will be the details of the image. High definition images are a consequence of a greater resolution. Resolution determines the clarity of the objects and text on the monitor.

At high resolution objects on the screen become smaller and look sharper. Monitors usually have standard 4: 3 or widescreen 9 and dimensions. This is the screen ratio. The number of pixels horizontally and vertically is the screen size. In printing the resolution is measured in DPI, dots per inch. For the photo to be of a normal quality, a resolution must be at least dpi. For example, to print a photo on the A4 piece of paper xmm or 8x11 inches, we need to multiply 8 by and 11 by And get xpx.

This should be the minimum size of the picture for printing on A4 sheet. If the size will be smaller, the printed image will be fuzzy and blurry. RGB color model stands for Red, Green and Blue is an additive color model in which those three main colors are mixed together to create other colors.

RGB color system is suited for surfaces that produce their own light. The screen surface of a computer monitor or a TV set is originally dark, so its original color is black. All other colors are obtained by using a combination of the three main colors, which in their mixture must create a white color. Experimentally it was proven that red, green and blue are the most suited for human eyes. As we know, the surface of the screen is not solid, it consists of small dots called pixels.

Each pixel consists of three blocks, red, green and blue. By varying the brightness level of each block we can get different colors. The information about the brightness level is encoded using binary code. For example, the most common for modern displays bit True Color system uses three bytes with values from 0 to for each pixel on the screen.

Absolutely red color will have a value This means that the amount of red color is full, of the green is 0 and of the blue is also 0. Absolutely blue color will have a value of 0. With different combinations different colors are formed: bright-violet is RGB color can also be encoded with the help of the hexadecimal system. Here are some standard colors:. This color system is called additive. In other words, we take black color no color and add primary colors to it, mixing them all the way up to white.

This way we can encode 16 colors, which is more than enough for human eyes. In a word, alt tag is an abbreviation of what is essentially an alt attribute on an image tag showing a nature or a content of its image.

That is why each image on any successful website has its alt tag that describes what is actually on it. As a result, various screen readers will make the image from your website accessible while reading out this alternative text. To illustrate the situation, that is an example of a complete HTML image tag:. So, why does one need alt text for their images? As it has already been mentioned, the alt text literally tells what an image depicts as well as describes the main function of this image on the web page.

Generally speaking, you just propose a person to use some services or buy some products that you provide with the help of this button. Thus, its alternative text simply explains what the button is used for. If you like these free eBooks, then please share it with your friends and colleagues. If you have any questions, feedback, or any other free Python book which you want to add into this list then just drop a comment.

It's a good idea to combine some courses from that list with these books to learn Python quickly and better. Labels: books , free resources , Python. Paolo Pignatelli July 13, at PM. Heicuu August 9, at AM. Unknown November 26, at PM. Anonymous April 5, at AM. Anonymous March 9, at AM. Unknown June 18, at PM. Anonymous September 26, at AM.

Anonymous May 5, at AM. Anonymous February 3, at PM. Puri jankari March 16, at PM. Unknown August 17, at AM. Unknown September 20, at AM. Bilmid June 7, at AM. To disable searching, set the option search: false in config.

The reader can change the font size bigger or smaller , the font family serif or sans serif , and the theme White , Sepia , or Night. You can set the initial value of these settings via the fontsettings option.

Font size is measured on a scale of ; the initial value can be set to 1, 2 default , 3, or 4. The button can be removed from the toolbar by setting fontsettings: null or no. The edit option is the same as the option mentioned in Section 4. If it is not empty, an edit button will be added to the toolbar. This was designed for potential contributors to the book to contribute by editing the book on GitHub after clicking the button and sending pull requests.

The history and view options work the same way. If your book has other output formats for readers to download, you may provide the download option so that a download button can be added to the toolbar. This option takes either a character vector, or a list of character vectors with the length of each vector being 2. When it is a character vector, it should be either a vector of filenames, or filename extensions, e. If you just want to suppress the download button, use download: false.

All files for readers to download will be displayed in a drop-down menu, and the filename extensions are used as the menu text. When the only available format for readers to download is PDF, the download button will be a single PDF button instead of a drop-down menu. An alternative form for the value of the download option is a list of length-2 vectors, e. Each vector in the list consists of the filename and the text to be displayed in the menu.

Compared to the first form, this form allows you to customize the menu text, e. On the right of the toolbar, there are some buttons to share the link on social network websites such as Twitter, Facebook, and Linkedin.

You can use the sharing option to decide which buttons to enable. If you want to get rid of these buttons entirely, use sharing: null or no. This button can be hidden by setting info: false. These options include:. Below we show some sample YAML metadata again, please note that these are top-level options :.

A nice effect of setting description and cover-image is that when you share the link of your book on some social network websites such as Twitter, the link can be automatically expanded to a card with the cover image and description of the book. On a full-size screen, the layout includes three columns of content so readers can quickly see all chapters on the left, the current chapter in the middle, and sections within the the current chapter on the right.

Easy customization of colors and fonts with the bslib package. Built-in search broken down by section that helps readers quickly find what they are looking for. A sidebar containing a within-chapter table of contents that makes navigation easy and helps provide context about your current position within the chapter.

Thoughtful typography to make the contents as easy as possible to read, regardless of the size of your device. A sticky header gets out of your way when reading, but is easily accessible if you need it. In-line footnotes mean you can read asides next to the text they refer to. This theme is best paired with a reference style that generates footnotes. R syntax highlighting and autolinking by the downlit package is paired with an accessible color scheme designed by Alison Hill.

This style is designed for books that use one chapter per page. This means that each chapter is an. Rmd file, and each. Rmd file can contain one chapter. Each file must start with a first-level heading, Chapter title , and that must be the only first-level heading in the file.