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Bootstrap (formerly Twitter Bootstrap) is a free and open-source CSS framework directed at responsive, mobile-first front-end web development. It contains HTML , CSS and (optionally) JavaScript -based design templates for typography , forms , buttons , navigation , and other interface components.
Ethan Marcotte coined the term responsive web design [36] —and defined it to mean fluid grid / flexible images / media queries—in a May 2010 article in A List Apart. [1] He described the theory and practice of responsive web design in his brief 2011 book titled Responsive Web Design.
From the late 2000s onward, the intensive use of the Web by mobile agents motivated "liquid layouts" and responsive elements for the growing variety of screen sizes. [5] In the 2010s, the intensive use of popular JavaScript layout frameworks, such as Bootstrap, inspired CSS flex-box and grid layout specifications. [6]
The Cascading Style Sheets (CSS) specification describes how elements of web pages are displayed by graphical browsers. Section 4 of the CSS1 specification defines a "formatting model" that gives block-level elements—such as p and blockquote—a width and height, and three levels of boxes surrounding it: padding, borders, and margins. [4]
Two notable and widely used examples are Bootstrap and Foundation. CSS frameworks offer different modules and tools: reset style sheet; grid especially for responsive web design; web typography; set of icons in sprites or icon fonts; styling for tooltips, buttons, elements of forms
With continuing development for mobile devices, such as smart phones and tablets, designers need to ensure that their site comes up correctly in browsers on all devices. This can be done by creating a responsive web design using stylesheets in CSS.
A huge sinkhole in a street in Surrey is continuing to grow and swallow up more road, with the county council declaring a major incident. The original hole first appeared in Godstone High Street ...
packed All images aligned by having same height, justified, captions centered under images packed-overlay Like packed, but caption overlays the image, in a translucent box packed-hover Like packed-overlay, but caption is only visible on hover (degrades gracefully on screen readers, and falls back to packed-overlay if a touch screen is used)