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Using the CSS display property, the container can be defined as either flex or inline-flex. Flex item Any direct child element held within the flex container is considered a flex item. Any text within the container element is wrapped in an unknown flex item. Axes Each flex box contains two axes: the main and cross axes.
One aspect of this module is the ability to create grid slots in a container semi-graphically, in a manner that has been described as "ASCII art", as in the superseded Template Layout module. Although the Flexible Box module is capable of performing 2-dimensional page layout, its intended purpose is to position elements primarily along a single ...
To demonstrate specificity Inheritance Inheritance is a key feature in CSS; it relies on the ancestor-descendant relationship to operate. Inheritance is the mechanism by which properties are applied not only to a specified element but also to its descendants. Inheritance relies on the document tree, which is the hierarchy of XHTML elements in a page based on nesting. Descendant elements may ...
Semantic HTML is a way of writing HTML that emphasizes the meaning of the encoded information over its presentation (look). HTML has included semantic markup from its inception, [85] but has also included presentational markup, such as < font >, < i > and < center > tags. There are also the semantically neutral div and span tags.
Historically, there have been other methods for controlling web page layout methods, such as tables, floats, and more recently, CSS Flexible Box Layout (flexbox). CSS grid is currently not an official standard (it is a W3C Candidate Recommendation ) although it has been adopted by the recent versions of all current major browsers.
Luke Wroblewski has summarized some of the RWD and mobile design challenges and created a catalog of multi-device layout patterns. [15] [16] [17] He suggested that, compared with a simple HWD approach [clarification needed], device experience or RESS (responsive web design with server-side components) approaches can provide a user experience that is better optimized for mobile devices.
HTML5 cannot provide animation within web pages. Additional JavaScript or CSS3 is necessary for animating HTML elements. Animation is also possible using JavaScript and HTML 4 [123] [failed verification], and within SVG elements through SMIL, although browser support of the latter remains uneven as of 2011.
The vast majority [4] of pages have JavaScript programs, enabling a wide range of behavior. [3] The newer WebAssembly language can also be used as a supplement. [5] The most sophisticated web pages, known as web apps, combine these elements in a complex manner.