Simon Yu

Dictionary for Web Developers



Background-Color Property
The background-color property sets the background color of an element which is the total size of the element, including padding and border (but not the margin).
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Cascading Style Sheets
CSS defines how HTML elements are to be displayed, also saving a lot of work. And External Style Sheets are stored in CSS files
Class Attribute
The class attribute specifies one or more class names for an element and is mostly used to point to a class in a style sheet. However, it can also be used by a JavaScript (via the HTML DOM) to make changes to HTML elements with a specified class.
Class Selector
The .class selector styles all elements with the specified class.
Color Property
The color property specifies the color of text.
CSS Validation
CSS validation finds errors and potential problems in Cascading Style Sheets.
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The <div> tag defines a division or a section in an HTML document and is used to group block-elements to format them with CSS.
The declaration contains one or more declarations separated by semicolons and each declaration includes a property name and a value, separated by a colon.

A domain is a person or organization's unique space on the internet. It is commonly used to mean the name of your website.
Domain Name
A name that identifies one or more IP addresses. Domain names are used in URLs to identify particular Web pages. For example, in the URL, the domain name is
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em Unit
The em unit is relative to the font-size of the element. For example, 2em means 2 times the size of the current font.
Embedded Styles
The embedded style is a CSS or cascading style sheets style that is written in the head of the XHTML document. It affects only the elements on that page.
External Style

An external style sheet is ideal when the style is applied to many pages. With an external stylesheet, people can change the look of an entire Web site by changing just one file.
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Font-Family Property
The font-family property specifies the font for an element.
Font-Size Property
The font-size property sets the size of a font.
Font-Style Property
The font-style property specifies the font style for a text.
Font-Weight Property
The font-weight property sets how thick or thin characters in text should be displayed.
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Hexadecimal Color
Colors in CSS are defined using a hexadecimal (hex) notation for the Red, Green, and Blue values (RGB).
The lowest value for each light source is 0 (hex 00). The highest value is 255 (hex FF).
Hex values are written as # followed by either three or six hex characters.
Three-digit notations (#rgb) are automatically converted to six digits (#rrggbb).
Host / Hosting
In order for you to have a website, a computer somewhere, with all the necessary software, has to provide you with 3 things: an IP (domain) address, physical space to store the information and bandwidth that accommodates the flow of information that is taking place on your behalf. The company that provides you with these facilities is your host and you will pay them a fee for hosting your site and or email address.
Hyper Text Markup Language. This is the base language that is used for creating websites.
Hyper Text Transfer Protocol. This is a method used to transfer information on the internet and normally precedes the "description" of the actual resource being accessed and transferred.
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ID Attribute
The id attribute specifies a unique id for an HTML element.
ID Selector
The #id selector styles the element with the specified id.
Inline Style
The inline style uses a style attribute in HTML elements.
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A type of file used for images, especially photographs. Images used on web pages work best as jpg or gif.
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Line-Height Property
The line-height property specifies the line
The <link> tag defines a link between a document and an external resource and is used to link to external style sheets.
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Margin-Left Property
The margin-left property sets the left margin of an element.
Margin-Right Property
The margin-right property sets the right margin of an element.
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Measuring Unit (1px = 1/96th of 1 in)
Measuring Unit (1pt = 1/72 of 1 in)
CSS properties are used to define styles of an element.
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Rel Attribute
The rel attribute specifies the relationship between the current document and the linked document.
RGB Color
RGB color values are supported in all major browsers.
An RGB color value is specified with: rgb(red, green, blue). Each parameter (red, green, and blue) defines the intensity of the color and can be an integer between 0 and 255 or a percentage value (from 0% to 100%).
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In CSS, selectors are patterns used to select the element need to be styled.
A server is a computer that is used to house websites and provide a physical storage area for websites and emails. Without a server, your website would not be viewable to the world. Servers are normally provided by hosting companies who keep the servers in special premises, under special conditions and with permanent connections to the internet.
The <span> tag is used to group inline-elements in a document, providing no visual change by itself and also providing a way to add a hook to a part of a text or a part of a document.
The <style> tag is used to define style information for an HTML document. Inside the <style> element you specify how HTML elements should render in a browser. And each HTML document can contain multiple <style> tags.
Style Attribute
The style attribute specifies an inline style for an element.
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Text-Align Property
The text-align property specifies the horizontal alignment of text in an element.
Text-Decoration Property
The text-decoration property specifies the decoration added to text.
Type Attribute
The type attribute specifies the Internet media type of the linked document.
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Uniform Resource Locator
A URL is a website address that has all the pertinent information for finding the exact location attached to it. is this website's url.
For a website to be visible to the world, it has to be put on the server that is hosting it. This process is called uploading because you are literally loading your information, pages, pictures, etc. up onto the server.
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Web Page
Just one page rather than a complete website (see below). A page is not the same as, for example, the page in a book. The length is not limited by a fixed height and width, but by user-friendliness, good practice and practicality.
Website Address
This is the location of your website and is normally typed as www.the-name-of-the
Web Safe Color Palette
In the stone age, when computers only supported 256 different colors, a list of 216 "Web Safe Colors" was suggested as a Web standard, reserving 40 fixed system colors.
This 216 cross-browser color palette was created to ensure that all computers would display colors correctly.
Width Property
The width property sets the width of an element.
World Wide Web. Another name for the internet.
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