Použití LESS s Bootstrap

Přizpůsobte a rozšiřte Bootstrap pomocí LESS , preprocesoru CSS, abyste využili výhody proměnných, mixinů a dalších, které se používají k sestavení CSS Bootstrapu.

Proč MÉNĚ?

Bootstrap je vyroben s LESS v jádru, dynamickým stylem jazykem vytvořeným naším dobrým přítelem Alexisem Sellierem . Díky tomu je vývoj systémových CSS rychlejší, jednodušší a zábavnější.

Co je zahrnuto?

Jako rozšíření CSS obsahuje LESS proměnné, mixiny pro opakovaně použitelné úryvky kódu, operace pro jednoduchou matematiku, vnořování a dokonce i barevné funkce.

Zjistěte více

Navštivte oficiální webovou stránku http://lesscss.org/ a dozvíte se více.

Proměnné

Správa barev a hodnot pixelů v CSS může být trochu náročná, obvykle plná kopírování a vkládání. Nikoli však s LESS – přiřaďte barvy nebo hodnoty pixelů jako proměnné a jednou je změňte.

Mixins

Tyto tři deklarace hraničního poloměru musíte udělat v běžném CSS? Nyní jsou na jednom řádku pomocí mixinů, úryvků kódu, které můžete znovu použít kdekoli.

Operace

Udělejte svou mřížku, vedení a superflexibilitu tím, že budete počítat operace za běhu. Násobením, dělením, sčítáním a odečítáním dosáhnete CSS zdravého rozumu.

Lešení a odkazy

`@bodyBackground`	`@white`	Barva pozadí stránky
`@textColor`	`@grayDark`	Výchozí barva textu pro celé tělo, nadpisy a další
`@linkColor`	`#08c`	Výchozí barva textu odkazu
`@linkColorHover`	`darken(@linkColor, 15%)`	Výchozí barva textu odkazu

Mřížkový systém

`@gridColumns`	12
`@gridColumnWidth`	60 pixelů
`@gridGutterWidth`	20 pixelů
`@fluidGridColumnWidth`	6,382978723 %
`@fluidGridGutterWidth`	2,127659574 %

Typografie

`@sansFontFamily`	"Helvetica Neue", Helvetica, Arial, sans-serif
`@serifFontFamily`	`Georgia, "Times New Roman", Times, serif`
`@monoFontFamily`	Menlo, Monako, "Courier New", monospace
`@baseFontSize`	13px	Musí to být pixely
`@baseFontFamily`	`@sansFontFamily`
`@baseLineHeight`	18px	Musí to být pixely
`@altFontFamily`	`@serifFontFamily`
`@headingsFontFamily`	`inherit`
`@headingsFontWeight`	`bold`
`@headingsColor`	`inherit`

Tabulky

`@tableBackground`	`transparent`
`@tableBackgroundAccent`	`#f9f9f9`
`@tableBackgroundHover`	`#f5f5f5`
`@tableBorder`	`ddd`

Barvy ve stupních šedi

`@black`	#000
`@grayDarker`	#222
`@grayDark`	#333
`@gray`	#555
`@grayLight`	#999
`@grayLighter`	#eee
`@white`	#fff

Akcentní barvy

`@blue`	#049 cdb
`@green`	#46a546
`@red`	#9d261d
`@yellow`	#ffc40d
`@orange`	#f89406
`@pink`	#c3325f
`@purple`	#7a43b6

Komponenty

Tlačítka

`@btnBackground`	`@white`
`@btnBackgroundHighlight`	`darken(@white, 10%)`
`@btnBorder`	`darken(@white, 20%)`
`@btnPrimaryBackground`	`@linkColor`
`@btnPrimaryBackgroundHighlight`	`spin(@btnPrimaryBackground, 15%)`
`@btnInfoBackground`	`#5bc0de`
`@btnInfoBackgroundHighlight`	`#2f96b4`
`@btnSuccessBackground`	`#62c462`
`@btnSuccessBackgroundHighlight`	`51a351`
`@btnWarningBackground`	`lighten(@orange, 15%)`
`@btnWarningBackgroundHighlight`	`@orange`
`@btnDangerBackground`	`#ee5f5b`
`@btnDangerBackgroundHighlight`	`#bd362f`
`@btnInverseBackground`	`@gray`
`@btnInverseBackgroundHighlight`	`@grayDarker`

formuláře

`@placeholderText`	`@grayLight`
`@inputBackground`	`@white`
`@inputBorder`	`#ccc`
`@inputBorderRadius`	`3px`
`@inputDisabledBackground`	`@grayLighter`
`@formActionsBackground`	`#f5f5f5`

Stavy formulářů a výstrahy

`@warningText`	#c09853
`@warningBackground`	#f3edd2
`@errorText`	#b94a48
`@errorBackground`	#f2dede
`@successText`	#468847
`@successBackground`	#dff0d8
`@infoText`	#3a87ad
`@infoBackground`	#d9edf7

Navbar

`@navbarHeight`	40 pixelů
`@navbarBackground`	`@grayDarker`
`@navbarBackgroundHighlight`	`@grayDark`
`@navbarText`	`@grayLight`
`@navbarLinkColor`	`@grayLight`
`@navbarLinkColorHover`	`@white`
`@navbarLinkColorActive`	`@navbarLinkColorHover`
`@navbarLinkBackgroundHover`	`transparent`
`@navbarLinkBackgroundActive`	`@navbarBackground`
`@navbarSearchBackground`	`lighten(@navbarBackground, 25%)`
`@navbarSearchBackgroundFocus`	`@white`
`@navbarSearchBorder`	`darken(@navbarSearchBackground, 30%)`
`@navbarSearchPlaceholderColor`	`#ccc`
`@navbarBrandColor`	`@navbarLinkColor`

Rozbalovací seznamy

`@dropdownBackground`	`@white`
`@dropdownBorder`	`rgba(0,0,0,.2)`
`@dropdownLinkColor`	`@grayDark`
`@dropdownLinkColorHover`	`@white`
`@dropdownLinkBackgroundHover`	`@linkColor`
`@@dropdownDividerTop`	`#e5e5e5`
`@@dropdownDividerBottom`	`@white`

Jednotka hrdiny

`@heroUnitBackground`	`@grayLighter`
`@heroUnitHeadingColor`	`inherit`
`@heroUnitLeadColor`	`inhereit`

O mixinech

Základní mixy

Základní mixin je v podstatě součástí úryvku CSS nebo jeho část. Jsou napsány stejně jako třída CSS a lze je volat kdekoli.

. prvek {
  . clearfix ();
}

Parametrické mixiny

A parametric mixin is just like a basic mixin, but it also accepts parameters (hence the name) with optional default values.

.element {
  .border-radius(4px);
}

Easily add your own

Nearly all of Bootstrap's mixins are stored in mixins.less, a wonderful utility .less file that enables you to use a mixin in any of the .less files in the toolkit.

So, go ahead and use the existing ones or feel free to add your own as you need.

Included mixins

Utilities

Mixin	Parameters	Usage
`.clearfix()`	none	Add to any parent to clear floats within
`.tab-focus()`	none	Apply the Webkit focus style and round Firefox outline
`.center-block()`	none	Auto center a block-level element using `margin: auto`
`.ie7-inline-block()`	none	Use in addition to regular `display: inline-block` to get IE7 support
`.size()`	`@height @width`	Quickly set the height and width on one line
`.square()`	`@size`	Builds on `.size()` to set the width and height as same value
`.opacity()`	`@opacity`	Set, in whole numbers, the opacity percentage (e.g., "50" or "75")

Forms

Mixin	Parameters	Usage
`.placeholder()`	`@color: @placeholderText`	Set the `placeholder` text color for inputs

Typography

Mixin	Parameters	Usage
`#font > #family > .serif()`	none	Make an element use a serif font stack
`#font > #family > .sans-serif()`	none	Make an element use a sans-serif font stack
`#font > #family > .monospace()`	none	Make an element use a monospace font stack
`#font > .shorthand()`	`@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight`	Easily set font size, weight, and leading
`#font > .serif()`	`@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight`	Set font family to serif, and control size, weight, and leading
`#font > .sans-serif()`	`@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight`	Set font family to sans-serif, and control size, weight, and leading
`#font > .monospace()`	`@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight`	Set font family to monospace, and control size, weight, and leading

Grid system

Mixin	Parameters	Usage
`.container-fixed()`	none	Create a horizontally centered container for holding your content
`#grid > .core()`	`@gridColumnWidth, @gridGutterWidth`	Generate a pixel grid system (container, row, and columns) with n columns and x pixel wide gutter
`#grid > .fluid()`	`@fluidGridColumnWidth, @fluidGridGutterWidth`	Generate a percent grid system with n columns and x % wide gutter
`#grid > .input()`	`@gridColumnWidth, @gridGutterWidth`	Generate the pixel grid system for `input` elements, accounting for padding and borders
`.makeColumn`	`@columns: 1, @offset: 0`	Turn any `div` into a grid column without the `.span*` classes

CSS3 properties

Mixin	Parameters	Usage
`.border-radius()`	`@radius`	Round the corners of an element. Can be a single value or four space-separated values
`.box-shadow()`	`@shadow`	Add a drop shadow to an element
`.transition()`	`@transition`	Add CSS3 transition effect (e.g., `all .2s linear`)
`.rotate()`	`@degrees`	Rotate an element n degrees
`.scale()`	`@ratio`	Scale an element to n times its original size
`.translate()`	`@x, @y`	Move an element on the x and y planes
`.background-clip()`	`@clip`	Crop the background of an element (useful for `border-radius`)
`.background-size()`	`@size`	Control the size of background images via CSS3
`.box-sizing()`	`@boxmodel`	Change the box model for an element (e.g., `border-box` for a full-width `input`)
`.user-select()`	`@select`	Control cursor selection of text on a page
`.backface-visibility()`	`@visibility: visible`	Prevent flickering of content when using CSS 3D transforms
`.resizable()`	`@direction: both`	Make any element resizable on the right and bottom
`.content-columns()`	`@columnCount, @columnGap: @gridGutterWidth`	Make the content of any element use CSS3 columns
`.hyphens()`	`@mode: auto`	CSS3 hyphenation when you want it (includes `word-wrap: break-word`)

Backgrounds and gradients

Mixin	Parameters	Usage
`#translucent > .background()`	`@color: @white, @alpha: 1`	Give an element a translucent background color
`#translucent > .border()`	`@color: @white, @alpha: 1`	Give an element a translucent border color
`#gradient > .vertical()`	`@startColor, @endColor`	Create a cross-browser vertical background gradient
`#gradient > .horizontal()`	`@startColor, @endColor`	Create a cross-browser horizontal background gradient
`#gradient > .directional()`	`@startColor, @endColor, @deg`	Create a cross-browser directional background gradient
`#gradient > .vertical-three-colors()`	`@startColor, @midColor, @colorStop, @endColor`	Create a cross-browser three-color background gradient
`#gradient > .radial()`	`@innerColor, @outerColor`	Create a cross-browser radial background gradient
`#gradient > .striped()`	`@color, @angle`	Create a cross-browser striped background gradient
`#gradientBar()`	`@primaryColor, @secondaryColor`	Used for buttons to assign a gradient and slightly darker border

Note: If you're submitting a pull request to GitHub with modified CSS, you must recompile the CSS via any of these methods.

Tools for compiling

Node with makefile

Install the LESS command line compiler, JSHint, Recess, and uglify-js globally with npm by running the following command:

$ npm install -g less jshint recess uglify-js

Once installed just run make from the root of your bootstrap directory and you're all set.

Additionally, if you have watchr installed, you may run make watch to have bootstrap automatically rebuilt every time you edit a file in the bootstrap lib (this isn't required, just a convenience method).

Command line

Install the LESS command line tool via Node and run the following command:

$ lessc ./less/bootstrap.less > bootstrap.css

Be sure to include --compress in that command if you're trying to save some bytes!

Javascript

Download the latest Less.js and include the path to it (and Bootstrap) in the <head>.

<link rel="stylesheet/less" href="/path/to/bootstrap.less">
<script src="/path/to/less.js"></script>

To recompile the .less files, just save them and reload your page. Less.js compiles them and stores them in local storage.

Unofficial Mac app

The unofficial Mac app watches directories of .less files and compiles the code to local files after every save of a watched .less file.

If you like, you can toggle preferences in the app for automatic minifying and which directory the compiled files end up in.

Postaveno s MÉNĚ