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v-4.02
responsive web design
Question | Answer |
---|---|
<div> tag | a division or a section in an HTML document is used to group block elements to format then with css can be nested meaning a tag contained within a tag |
<table> tag | should not be used for layout tables are intended for presenting tabular data |
<header> tag | specifies a header for a document or section |
<header> element | should be used as a container for introductory content |
<footer> tag | defines a footer for a document or section |
<footer> | typically contains the author of the document copyright information links to terms of use contact information etc |
<nav> tag | defines a set of navigation links only intended for major block of navigation links |
device pixel | the smallest element on the screen; also known as physical pixel |
screen density or pixel density | the number of device pixels on a physical surface, if is often measured in pixels per inch |
resolution | a simple count of the number of pixels across the entire width and height of a device |
viewport | the rectangular area ( measure in pixels) that is viewable on a device |
mobile accessibility | making websites and applications more accessible to people with disabilities when they are using mobile devices |
reference pixel | a new pixel that should look exactly the same in all viewing situations |
responsive web design | RWD takes existing techniques involving flexible grid layout flexible images and media and media queries creating a unified approach to wen design |
fixed-width layout | has a wrapper (or container) that is fixed width and the components inside it have either percentage widths or fixed widths |
fluid or liquid layouts | define dimensions in percentages rather then pixels |
absolute units | include pixels (px) recommended for screens occasional print points (pt)- recommended for print not for screens |
relative units | include em a( font size of the element) recommended for screen or print |
% percentage | recommended for screen print |
em | a unit of measurements in the field of typography equal to the currently specified point size equal to the default size of 16px |
bitmap pixel | the smallest unit of data in a raster image |
css pixel | a unit of measurement for a web pages |