精品久久久久久亚洲精品_成人午夜网站_www日本高清_亚洲精品久久久久午夜福

Sass

Utilize our source Sass files to take advantage of variables, maps, mixins, and functions to help you build faster and customize your project.

Utilize our source Sass files to take advantage of variables, maps, mixins, and more.

File structure

Whenever possible, avoid modifying Bootstrap’s core files. For Sass, that means creating your own stylesheet that imports Bootstrap so you can modify and extend it. Assuming you’re using a package manager like npm, you’ll have a file structure that looks like this:

your-project/
├── scss
│   └── custom.scss
└── node_modules/
└── bootstrap
    ├── js
    └── scss

If you’ve downloaded our source files and aren’t using a package manager, you’ll want to manually setup something similar to that structure, keeping Bootstrap’s source files separate from your own.

your-project/
├── scss
│   └── custom.scss
└── bootstrap/
├── js
└── scss

Importing

In your custom.scss, you’ll import Bootstrap’s source Sass files. You have two options: include all of Bootstrap, or pick the parts you need. We encourage the latter, though be aware there are some requirements and dependencies across our components. You also will need to include some JavaScript for our plugins.

// Custom.scss
// Option A: Include all of Bootstrap

// Include any default variable overrides here (though functions won't be available)

@import "../node_modules/bootstrap/scss/bootstrap";

// Then add additional custom code here
// Custom.scss
// Option B: Include parts of Bootstrap

// 1. Include functions first (so you can manipulate colors, SVGs, calc, etc)
@import "../node_modules/bootstrap/scss/functions";

// 2. Include any default variable overrides here

// 3. Include remainder of required Bootstrap stylesheets
@import "../node_modules/bootstrap/scss/variables";
@import "../node_modules/bootstrap/scss/mixins";

// 4. Include any optional Bootstrap components as you like
@import "../node_modules/bootstrap/scss/root";
@import "../node_modules/bootstrap/scss/reboot";
@import "../node_modules/bootstrap/scss/type";
@import "../node_modules/bootstrap/scss/images";
@import "../node_modules/bootstrap/scss/containers";
@import "../node_modules/bootstrap/scss/grid";

// 5. Add additional custom code here

With that setup in place, you can begin to modify any of the Sass variables and maps in your custom.scss. You can also start to add parts of Bootstrap under the // Optional section as needed. We suggest using the full import stack from our bootstrap.scss file as your starting point.

Variable defaults

Every Sass variable in Bootstrap includes the !default flag allowing you to override the variable’s default value in your own Sass without modifying Bootstrap’s source code. Copy and paste variables as needed, modify their values, and remove the !default flag. If a variable has already been assigned, then it won’t be re-assigned by the default values in Bootstrap.

You will find the complete list of Bootstrap’s variables in scss/_variables.scss. Some variables are set to null, these variables don’t output the property unless they are overridden in your configuration.

Variable overrides must come after our functions, variables, and mixins are imported, but before the rest of the imports.

Here’s an example that changes the background-color and color for the <body> when importing and compiling Bootstrap via npm:

// Required
@import "../node_modules/bootstrap/scss/functions";

// Default variable overrides
$body-bg: #000;
$body-color: #111;

// Required
@import "../node_modules/bootstrap/scss/variables";
@import "../node_modules/bootstrap/scss/mixins";

// Bootstrap and its default variables

// Optional Bootstrap components here
@import "../node_modules/bootstrap/scss/root";
@import "../node_modules/bootstrap/scss/reboot";
@import "../node_modules/bootstrap/scss/type";
// etc

Repeat as necessary for any variable in Bootstrap, including the global options below.

Get started with Bootstrap via npm with our starter project! Head to the twbs/bootstrap-npm-starter template repository to see how to build and customize Bootstrap in your own npm project. Includes Sass compiler, Autoprefixer, Stylelint, PurgeCSS, and Bootstrap Icons.

Maps and loops

Bootstrap includes a handful of Sass maps, key value pairs that make it easier to generate families of related CSS. We use Sass maps for our colors, grid breakpoints, and more. Just like Sass variables, all Sass maps include the !default flag and can be overridden and extended.

Some of our Sass maps are merged into empty ones by default. This is done to allow easy expansion of a given Sass map, but comes at the cost of making removing items from a map slightly more difficult.

Modify map

All variables in the $theme-colors map are defined as standalone variables. To modify an existing color in our $theme-colors map, add the following to your custom Sass file:

$primary: #0074d9;
$danger: #ff4136;

Later on, theses variables are set in Bootstrap’s $theme-colors map:

$theme-colors: (
"primary": $primary,
"danger": $danger
);

Add to map

Add new colors to $theme-colors, or any other map, by creating a new Sass map with your custom values and merging it with the original map. In this case, we’ll create a new $custom-colors map and merge it with $theme-colors.

// Create your own map
$custom-colors: (
"custom-color": #900
);

// Merge the maps
$theme-colors: map-merge($theme-colors, $custom-colors);

Remove from map

To remove colors from $theme-colors, or any other map, use map-remove. Be aware you must insert it between our requirements and options:

// Required
@import "../node_modules/bootstrap/scss/functions";
@import "../node_modules/bootstrap/scss/variables";
@import "../node_modules/bootstrap/scss/mixins";

$theme-colors: map-remove($theme-colors, "info", "light", "dark");

// Optional
@import "../node_modules/bootstrap/scss/root";
@import "../node_modules/bootstrap/scss/reboot";
@import "../node_modules/bootstrap/scss/type";
// etc

Required keys

Bootstrap assumes the presence of some specific keys within Sass maps as we used and extend these ourselves. As you customize the included maps, you may encounter errors where a specific Sass map’s key is being used.

For example, we use the primary, success, and danger keys from $theme-colors for links, buttons, and form states. Replacing the values of these keys should present no issues, but removing them may cause Sass compilation issues. In these instances, you’ll need to modify the Sass code that makes use of those values.

Functions

Colors

Next to the Sass maps we have, theme colors can also be used as standalone variables, like $primary.

.custom-element {
color: $gray-100;
background-color: $dark;
}

You can lighten or darken colors with Bootstrap’s tint-color() and shade-color() functions. These functions will mix colors with black or white, unlike Sass' native lighten() and darken() functions which will change the lightness by a fixed amount, which often doesn’t lead to the desired effect.

// Tint a color: mix a color with white
@function tint-color($color, $weight) {
@return mix(white, $color, $weight);
}

// Shade a color: mix a color with black
@function shade-color($color, $weight) {
@return mix(black, $color, $weight);
}

// Shade the color if the weight is positive, else tint it
@function shift-color($color, $weight) {
@return if($weight > 0, shade-color($color, $weight), tint-color($color, -$weight));
}

In practice, you’d call the function and pass in the color and weight parameters.

.custom-element {
color: tint-color($primary, 10%);
}

.custom-element-2 {
color: shade-color($danger, 30%);
}

Color contrast

In order to meet WCAG 2.0 accessibility standards for color contrast, authors must provide a contrast ratio of at least 4.5:1, with very few exceptions.

An additional function we include in Bootstrap is the color contrast function, color-contrast. It utilizes the WCAG 2.0 algorithm for calculating contrast thresholds based on relative luminance in a sRGB colorspace to automatically return a light (#fff), dark (#212529) or black (#000) contrast color based on the specified base color. This function is especially useful for mixins or loops where you’re generating multiple classes.

For example, to generate color swatches from our $theme-colors map:

@each $color, $value in $theme-colors {
.swatch-#{$color} {
color: color-contrast($value);
}
}

It can also be used for one-off contrast needs:

.custom-element {
color: color-contrast(#000); // returns `color: #fff`
}

You can also specify a base color with our color map functions:

.custom-element {
color: color-contrast($dark); // returns `color: #fff`
}

Escape SVG

We use the escape-svg function to escape the <, > and # characters for SVG background images. When using the escape-svg function, data URIs must be quoted.

Add and Subtract functions

We use the add and subtract functions to wrap the CSS calc function. The primary purpose of these functions is to avoid errors when a “unitless” 0 value is passed into a calc expression. Expressions like calc(10px - 0) will return an error in all browsers, despite being mathematically correct.

Example where the calc is valid:

$border-radius: .25rem;
$border-width: 1px;

.element {
// Output calc(.25rem - 1px) is valid
  border-radius: calc($border-radius - $border-width);
}

.element {
// Output the same calc(.25rem - 1px) as above
  border-radius: subtract($border-radius, $border-width);
}

Example where the calc is invalid:

$border-radius: .25rem;
$border-width: 0;

.element {
// Output calc(.25rem - 0) is invalid
  border-radius: calc($border-radius - $border-width);
}

.element {
// Output .25rem
  border-radius: subtract($border-radius, $border-width);
}
返回頂部
精品久久久久久亚洲精品_成人午夜网站_www日本高清_亚洲精品久久久久午夜福

      国产日韩av在线播放| 玖玖玖国产精品| 国内外成人免费激情在线视频| 久久综合五月天婷婷伊人| 亚洲伊人一本大道中文字幕| 怡红院精品视频在线观看极品| 国产精品久久久久aaaa| 欧美www在线| 久久久久国产免费免费| 亚洲午夜电影网| 日韩视频免费| 亚洲精品欧美激情| 伊人精品视频| 国产亚洲一级高清| 国产精品丝袜91| 国产精品久久久久一区二区三区| 欧美大片在线影院| 久久久噜噜噜久噜久久| 欧美一区二区三区四区在线| 一区二区久久久久| 亚洲最黄网站| 一本色道久久88综合亚洲精品ⅰ| 亚洲第一福利在线观看| 国产婷婷97碰碰久久人人蜜臀| 国产精品久久久久免费a∨大胸 | 在线日韩精品视频| 国产在线成人| 国内精品视频在线观看| 国产日韩欧美综合在线| 国产精品五月天| 国产日韩精品电影| 国产人妖伪娘一区91| 国内成人精品一区| 精品二区视频| 亚洲欧洲日本mm| 99精品国产在热久久下载| 一本在线高清不卡dvd| 中日韩美女免费视频网址在线观看 | 久久亚洲一区二区三区四区| 久久久人成影片一区二区三区观看 | 亚洲高清激情| 亚洲人线精品午夜| 在线一区二区三区做爰视频网站| 中文国产成人精品| 亚洲欧美日韩成人高清在线一区| 西瓜成人精品人成网站| 亚洲自拍偷拍福利| 欧美亚洲综合在线| 久久久久国产一区二区三区四区| 免费久久99精品国产自在现线| 欧美日本成人| 国产亚洲欧美一级| 亚洲精品日韩欧美| 亚洲欧美一区二区原创| 蜜臀av性久久久久蜜臀aⅴ四虎 | 欧美大成色www永久网站婷| 欧美日韩国产综合在线| 国产三级精品三级| 亚洲理伦电影| 久久精品国产第一区二区三区最新章节| 老**午夜毛片一区二区三区| 欧美日韩国产一区精品一区| 国产视频欧美| 亚洲小说欧美另类婷婷| 久久人人看视频| 国产精品网站在线| 亚洲精品欧美日韩| 久久免费一区| 国产欧美精品xxxx另类| 亚洲国产日韩精品| 久久精彩免费视频| 国产精品一区二区三区乱码| 亚洲国产成人精品久久| 欧美专区在线观看一区| 国产精品成人av性教育| 亚洲片国产一区一级在线观看| 午夜伦理片一区| 欧美三级电影大全| 亚洲精品国产精品国自产观看浪潮| 欧美亚洲综合在线| 欧美午夜寂寞影院| 亚洲免费av片| 欧美激情免费观看| 亚洲黄色一区| 久久深夜福利免费观看| 午夜一区不卡| 最新亚洲视频| 欧美高清自拍一区| 亚洲国产精品www| 久久精品视频网| 国产日韩高清一区二区三区在线| 亚洲午夜黄色| 欧美午夜片在线观看| 99国产精品一区| 欧美日韩国产精品一卡| aa日韩免费精品视频一| 欧美日韩精品在线观看| 亚洲精品系列| 欧美日韩a区| 日韩亚洲欧美综合| 欧美天天视频| 亚洲欧美日韩爽爽影院| 国产三级欧美三级| 久久久美女艺术照精彩视频福利播放| 国产亚洲亚洲| 蜜月aⅴ免费一区二区三区| 亚洲国产精品123| 欧美日韩精品一区| 一区二区三区四区五区在线| 国产精品久久亚洲7777| 香蕉久久夜色| 在线观看欧美日本| 欧美日韩国产成人在线观看| 亚洲在线一区二区| 国产一区高清视频| 欧美激情中文字幕乱码免费| 9久re热视频在线精品| 国产精品久久久久久亚洲毛片| 性欧美办公室18xxxxhd| 亚洲电影免费| 欧美午夜宅男影院| 久久久人成影片一区二区三区| 亚洲国产色一区| 国产精品国产三级国产普通话蜜臀 | 亚洲日韩中文字幕在线播放| 欧美体内she精视频| 久久国产精品免费一区| 黄色成人av| 欧美日韩国产综合视频在线观看中文 | 国产伦精品一区二区| 久久久999| 一区二区三区日韩欧美精品| 国模套图日韩精品一区二区| 欧美日韩国产一区| 久久久亚洲午夜电影| 99热在线精品观看| 尤物yw午夜国产精品视频明星| 欧美区视频在线观看| 久久久精品999| 亚洲图片你懂的| 亚洲欧洲一区二区在线观看| 国产精品一区二区在线观看| 欧美黄色免费| 久久久久久久999| 亚洲欧美一区二区三区在线| 亚洲精品久久7777| 激情久久久久久久| 国产日韩欧美精品| 国产精品高清在线观看| 欧美成人日本| 久久综合久久久| 久久精品中文字幕一区二区三区| 亚洲一区欧美激情| 亚洲美女视频在线免费观看| 亚洲风情亚aⅴ在线发布| 国内精品国产成人| 国产情侣一区| 国产精品日韩在线| 国产精品成人一区| 国产精品第13页| 欧美三级视频在线观看| 欧美黄在线观看| 欧美成人情趣视频| 免费看成人av| 欧美成人黑人xx视频免费观看| 久久精品青青大伊人av| 欧美一级午夜免费电影| 欧美一区二区三区四区高清| 午夜精品视频在线观看| 欧美在线观看www| 久久久99精品免费观看不卡| 欧美一区精品| 久久精品国产亚洲一区二区| 久久九九热re6这里有精品 | 在线日韩中文字幕| 亚洲国产精彩中文乱码av在线播放| 在线观看一区二区精品视频| 亚洲高清色综合| 日韩视频在线免费观看| 正在播放欧美视频| 欧美一区二区视频在线观看2020 | 欧美.www| 欧美激情一区二区三区四区| 欧美日韩国产首页在线观看| 欧美久久久久久久| 国产精品网站视频| 伊人久久综合| 夜夜精品视频| 欧美怡红院视频| 免费成人网www| 国产精品盗摄久久久| 国产亚洲精品资源在线26u| 一区在线播放| 一本色道久久综合狠狠躁篇的优点| 亚洲香蕉视频| 久久免费少妇高潮久久精品99| 欧美福利电影在线观看| 国产伦精品一区二区三区免费迷| 亚洲电影中文字幕| 亚洲欧美日韩视频二区|