Persistent Headers. This is some code to get the header of some content area to stay visible at the top of the screen as you scroll through that content.
This is useful because it prevents needing to define that same property for all children. For example, the font-size property can be set (as it often is) on the <body> element, and virtually every element that is a child of <body> will inherit that font-size setting. This prevents your CSS from looking something like this: So, a number of properties in the CSS specification are able to naturally pass on their values to child elements. If you want, however, you can force a property in a child element to inherit the value for that property from its parent by using the inherit value. So, if for some strange reason, you wanted all of your paragraphs to inherit the hot pink border of their parent <div> element, then the code above would accomplish this.
Of course, this seems like just another way to skin the cat, as they say. And that would accomplish the same thing. Full Browser Width Bars. Block level elements are naturally as wide as their parent element. So let's say you put an <h2>in your <body> (and you've used reset CSS so there is no padding on the body) that <h2>is automatically the full width of the browser window. It doesn't need any help. But it's pretty rare (and stupid) these days to set text at the full browser window width (for desktop/laptop size screens). It's just too wide, the line length is too long to be readable. It's reasonable that we would want an element to stretch the full width of the browser window, for aesthetic reasons, but limit the text inside to a readable width.
One way to accomplish that is to have inner wrappers for the headers, like: <h2><div>Header</div><h2><p>... text ... That way the <h2>could be left to be full-width, but the <div> could be used to limit the width to the same width as the <p>'s. Convertir une image en CSS. Convertir une image en CSS Si vous pratiquez l'envoi de newsletters dans lesquelles vous avez mis des images, vous avez peut être remarqué que la plupart des webmails et clients mails bloquaient les images.
Gmail, Yahoo! , Hotmail, c'est toujours à vous d'autoriser l'affichage des images dans les emails. Et pourtant il existe un moyen de les afficher quand même malgré ce blocage. Create CSS Sprite Images Easily with Sprite Cow. Sprite Cow helps you get the background-position, width and height of sprites within a spritesheet as a nice bit of copyable css.
Découvrez 7 astuces pour réaliser la votre en CSS. Une timeline en CSS permet de se dispenser d’une image, difficilement évolutive dans un site web dynamique. En débutant avec le CSS, il n’est pas toujours aisé de « coder » sa propre timeline. Quelles balises HTML utiliser ? CSS Tools: Reset CSS. The goal of a reset stylesheet is to reduce browser inconsistencies in things like default line heights, margins and font sizes of headings, and so on.
The general reasoning behind this was discussed in a May 2007 post, if you're interested. Reset styles quite often appear in CSS frameworks, and the original "meyerweb reset" found its way into Blueprint, among others. The reset styles given here are intentionally very generic. There isn't any default color or background set for the body element, for example. I don't particularly recommend that you just use this in its unaltered state in your own projects. In other words, this is a starting point, not a self-contained black box of no-touchiness. 10 techniques avancées et secrets de CSS2 - Alsacréations.