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diff --git a/es-es/css-es.html b/es-es/css-es.html new file mode 100644 index 00000000..506a9467 --- /dev/null +++ b/es-es/css-es.html @@ -0,0 +1,327 @@ +--- +language: css +contributors: + - ["Mohammad Valipour", "https://github.com/mvalipour"] + - ["Marco Scannadinari", "https://github.com/marcoms"] + - ["Geoffrey Liu", "https://github.com/g-liu"] + - ["Connor Shea", "https://github.com/connorshea"] + - ["Deepanshu Utkarsh", "https://github.com/duci9y"] + - ["Brett Taylor", "https://github.com/glutnix"] + - ["Tyler Mumford", "https://tylermumford.com"] +translators: + - ["miky ackerman", "https://github.com/mikyackerman"] +lang: es-es +filename: learncss-es.css +--- + +Paginas web estan contruidas en HTML, lo cual especifica el contenido de una pagina +CSS(Hoja de Estilos en Cascada) es un lenguaje separado el cual especifica +la **apariencia** de una pagina. + +codigo CSS esta hecho de *reglas* estaticas. Cada regla toma uno o mas *selectores* y da *valores* especificos a un numero de *propiedades* visuales. Esas propiedades estan entonces aplicadas a los elementos indicados en una pagina por los selectores + +Esta guia ha sido escrita con CSS 2 en mente, la cual es extendida por una nueva caracterica de CSS 3. + +**NOTA:** Debido a que CSS produce resultados visuales, para aprenderlo, necesitas +Probar todo en un patio de juegos CSS como [dabblet] (http://dabblet.com/). +El objetivo principal de este artÃculo es la sintaxis y algunos consejos generales. + +## Sintaxis + +```css +/* Los comentarios aparecen dentro de un diagonal-asterisco, justo como esta linea + no hay "comentarios en una linea"; este es el unico estilo de comentario.*/ + + +/* #################### + ## SELECTORS + #################### */ + +/* el selector es usado para apuntar a un elemento de la pagina. */ +selector { property: value; /* more properties...*/ } + +/* +Here is an example element: + +<div class='class1 class2' id='anID' attr='value' otherAttr='en-us foo bar' /> +*/ + +/* You can target it using one of its CSS classes */ +.class1 { } + +/* or both classes! */ +.class1.class2 { } + +/* or its name */ +div { } + +/* or its id */ +#anID { } + +/* or using the fact that it has an attribute! */ +[attr] { font-size:smaller; } + +/* or that the attribute has a specific value */ +[attr='value'] { font-size:smaller; } + +/* starts with a value (CSS 3) */ +[attr^='val'] { font-size:smaller; } + +/* or ends with a value (CSS 3) */ +[attr$='ue'] { font-size:smaller; } + +/* or contains a value in a space-separated list */ +[otherAttr~='foo'] { } +[otherAttr~='bar'] { } + +/* or contains a value in a dash-separated list, e.g., "-" (U+002D) */ +[otherAttr|='en'] { font-size:smaller; } + + +/* You can combine different selectors to create a more focused selector. Don't + put spaces between them. */ +div.some-class[attr$='ue'] { } + +/* You can select an element which is a child of another element */ +div.some-parent > .class-name { } + +/* or a descendant of another element. Children are the direct descendants of + their parent element, only one level down the tree. Descendants can be any + level down the tree. */ +div.some-parent .class-name { } + +/* Warning: the same selector without a space has another meaning. + Can you guess what? */ +div.some-parent.class-name { } + +/* You may also select an element based on its adjacent sibling */ +.i-am-just-before + .this-element { } + +/* or any sibling preceding it */ +.i-am-any-element-before ~ .this-element { } + +/* There are some selectors called pseudo classes that can be used to select an + element only when it is in a particular state */ + +/* for example, when the cursor hovers over an element */ +selector:hover { } + +/* or a link has been visited */ +selector:visited { } + +/* or hasn't been visited */ +selected:link { } + +/* or an element is in focus */ +selected:focus { } + +/* any element that is the first child of its parent */ +selector:first-child {} + +/* any element that is the last child of its parent */ +selector:last-child {} + +/* Just like pseudo classes, pseudo elements allow you to style certain parts of + a document */ + +/* matches a virtual first child of the selected element */ +selector::before {} + +/* matches a virtual last child of the selected element */ +selector::after {} + +/* At appropriate places, an asterisk may be used as a wildcard to select every + element */ +* { } /* all elements */ +.parent * { } /* all descendants */ +.parent > * { } /* all children */ + +/* #################### + ## PROPERTIES + #################### */ + +selector { + + /* Units of length can be absolute or relative. */ + + /* Relative units */ + width: 50%; /* percentage of parent element width */ + font-size: 2em; /* multiples of element's original font-size */ + font-size: 2rem; /* or the root element's font-size */ + font-size: 2vw; /* multiples of 1% of the viewport's width (CSS 3) */ + font-size: 2vh; /* or its height */ + font-size: 2vmin; /* whichever of a vh or a vw is smaller */ + font-size: 2vmax; /* or greater */ + + /* Absolute units */ + width: 200px; /* pixels */ + font-size: 20pt; /* points */ + width: 5cm; /* centimeters */ + min-width: 50mm; /* millimeters */ + max-width: 5in; /* inches */ + + /* Colors */ + color: #F6E; /* short hex format */ + color: #FF66EE; /* long hex format */ + color: tomato; /* a named color */ + color: rgb(255, 255, 255); /* as rgb values */ + color: rgb(10%, 20%, 50%); /* as rgb percentages */ + color: rgba(255, 0, 0, 0.3); /* as rgba values (CSS 3) Note: 0 <= a <= 1 */ + color: transparent; /* equivalent to setting the alpha to 0 */ + color: hsl(0, 100%, 50%); /* as hsl percentages (CSS 3) */ + color: hsla(0, 100%, 50%, 0.3); /* as hsl percentages with alpha */ + + /* Borders */ + border-width:5px; + border-style:solid; + border-color:red; /* similar to how background-color is set */ + border: 5px solid red; /* this is a short hand approach for the same */ + border-radius:20px; /* this is a CSS3 property */ + + /* Images as backgrounds of elements */ + background-image: url(/img-path/img.jpg); /* quotes inside url() optional */ + + /* Fonts */ + font-family: Arial; + /* if the font family name has a space, it must be quoted */ + font-family: "Courier New"; + /* if the first one is not found, the browser uses the next, and so on */ + font-family: "Courier New", Trebuchet, Arial, sans-serif; +} +``` + +## Usage + +Save a CSS stylesheet with the extension `.css`. + +```html +<!-- You need to include the css file in your page's <head>. This is the + recommended method. Refer to http://stackoverflow.com/questions/8284365 --> +<link rel='stylesheet' type='text/css' href='path/to/style.css'> + +<!-- You can also include some CSS inline in your markup. --> +<style> + a { color: purple; } +</style> + +<!-- Or directly set CSS properties on the element. --> +<div style="border: 1px solid red;"> +</div> +``` + +## Precedence or Cascade + +An element may be targeted by multiple selectors and may have a property set on +it in more than once. In these cases, one of the rules takes precedence over +others. Rules with a more specific selector take precedence over a less specific +one, and a rule occurring later in the stylesheet overwrites a previous one +(which also means that if two different linked stylesheets contain rules for an +element and if the rules are of the same specificity, then order of linking +would take precedence and the sheet linked latest would govern styling) . + +This process is called cascading, hence the name Cascading Style Sheets. + +Given the following CSS: + +```css +/* A */ +p.class1[attr='value'] + +/* B */ +p.class1 { } + +/* C */ +p.class2 { } + +/* D */ +p { } + +/* E */ +p { property: value !important; } +``` + +and the following markup: + +```html +<p style='/*F*/ property:value;' class='class1 class2' attr='value'> +``` + +The precedence of style is as follows. Remember, the precedence is for each +**property**, not for the entire block. + +* `E` has the highest precedence because of the keyword `!important`. It is +recommended that you avoid its usage. +* `F` is next, because it is an inline style. +* `A` is next, because it is more "specific" than anything else. It has 3 + specifiers: The name of the element `p`, its class `class1`, an attribute + `attr='value'`. +* `C` is next, even though it has the same specificity as `B`. + This is because it appears after `B`. +* `B` is next. +* `D` is the last one. + +## Media Queries + +CSS Media Queries are a feature in CSS 3 which allows you to specify when certain CSS rules should be applied, such as when printed, or when on a screen with certain dimensions or pixel density. They do not add to the selector's specificity. + +```css +/* A rule that will be used on all devices */ +h1 { + font-size: 2em; + color: white; + background-color: black; +} + +/* change the h1 to use less ink on a printer */ +@media print { + h1 { + color: black; + background-color: white; + } +} + +/* make the font bigger when shown on a screen at least 480px wide */ +@media screen and (min-width: 480px) { + h1 { + font-size: 3em; + font-weight: normal; + } +} +``` + +Media queries can include these features: +`width`, `height`, `device-width`, `device-height`, `orientation`, `aspect-ratio`, `device-aspect-ratio`, `color`, `color-index`, `monochrome`, `resolution`, `scan`, `grid`. Most of these features can be prefixed with `min-` or `max-`. + +The `resolution` feature is not supported by older devices, instead use `device-pixel-ratio`. + +Many smartphones and tablets will attempt to render the page as if it were on a desktop unless you provide a `viewport` meta-tag. + +```html +<head> + <meta name="viewport" content="width=device-width; initial-scale=1.0"> +</head> +``` + +## Compatibility + +Most of the features in CSS 2 (and many in CSS 3) are available across all +browsers and devices. But it's always good practice to check before using +a new feature. + +## Resources + +* [CanIUse](http://caniuse.com) (Detailed compatibility info) +* [Dabblet](http://dabblet.com/) (CSS playground) +* [Mozilla Developer Network's CSS documentation](https://developer.mozilla.org/en-US/docs/Web/CSS) (Tutorials and reference) +* [Codrops' CSS Reference](http://tympanus.net/codrops/css_reference/) (Reference) + +## Further Reading + +* [Understanding Style Precedence in CSS: Specificity, Inheritance, and the Cascade](http://www.vanseodesign.com/css/css-specificity-inheritance-cascaade/) +* [Selecting elements using attributes](https://css-tricks.com/almanac/selectors/a/attribute/) +* [QuirksMode CSS](http://www.quirksmode.org/css/) +* [Z-Index - The stacking context](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Understanding_z_index/The_stacking_context) +* [SASS](http://sass-lang.com/) and [LESS](http://lesscss.org/) for CSS pre-processing +* [CSS-Tricks](https://css-tricks.com) + + |