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Ejemplo 1: bootstrap css
<linkhref="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css"rel="stylesheet"integrity="sha384-wEmeIV1mKuiNpC+IOBjI7aAzPcEZeedi5yW5f2yOq55WWLwNGmvvx4Um1vskeMj0"crossorigin="anonymous">Ejemplo 2: desplazamiento de bootstrap 3
col-sm-offset-2Ejemplo 3: bootstrap Responsive
Responsive containers are new in Bootstrap v4.4. They allow you to specify a class that is 100% wide until the specified breakpoint is reached, after which we apply max-widths for each of the higher breakpoints. For example, .container-sm is 100% wide to start until the sm breakpoint is reached, where it will scale up with md, lg, and xl.
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<divclass="container-sm">100% wide until small breakpointdiv><divclass="container-md">100% wide until medium breakpointdiv><divclass="container-lg">100% wide until large breakpointdiv><divclass="container-xl">100% wide until extra large breakpointdiv>
// Extra small devices (portrait phones, less than 576px)
// No media query for `xs` since this is the default in Bootstrap
// Small devices (landscape phones, 576px and up)
@media (min-width: 576px) ...
// Medium devices (tablets, 768px and up)
@media (min-width: 768px) ...
// Large devices (desktops, 992px and up)
@media (min-width: 992px) ...
// Extra large devices (large desktops, 1200px and up)
@media (min-width: 1200px) ...
Since we write our source CSS in Sass, all our media queries are available via Sass mixins:
// No media query necessary for xs breakpoint as it's effectively `@media (min-width: 0) ... `
@include media-breakpoint-up(sm) ...
@include media-breakpoint-up(md) ...
@include media-breakpoint-up(lg) ...
@include media-breakpoint-up(xl) ...
// Example: Hide starting at `min-width: 0`, and then show at the `sm` breakpoint
.custom-class
display: none;
@include media-breakpoint-up(sm)
.custom-class
display: block;
We occasionally use media queries that go in the other direction (the given screen size or smaller):
// Extra small devices (portrait phones, less than 576px)
@media (max-width: 575.98px) ...
// Small devices (landscape phones, less than 768px)
@media (max-width: 767.98px) ...
// Medium devices (tablets, less than 992px)
@media (max-width: 991.98px) ...
// Large devices (desktops, less than 1200px)
@media (max-width: 1199.98px) ...
// Extra large devices (large desktops)
// No media query since the extra-large breakpoint has no upper bound on its width
Once again, these media queries are also available via Sass mixins:
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@include media-breakpoint-down(xs) ...
@include media-breakpoint-down(sm) ...
@include media-breakpoint-down(md) ...
@include media-breakpoint-down(lg) ...
// No media query necessary for xl breakpoint as it has no upper bound on its width
// Example: Style from medium breakpoint and down
@include media-breakpoint-down(md)
.custom-class
display: block;
$zindex-dropdown: 1000 !default;
$zindex-sticky: 1020 !default;
$zindex-fixed: 1030 !default;
$zindex-modal-backdrop: 1040 !default;
$zindex-modal: 1050 !default;
$zindex-popover: 1060 !default;
$zindex-tooltip: 1070 !default;Ejemplo 4: ancho del contenedor bootstrap
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Bootstrap Container Width | Size | Class Prefix
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Extra small devices Phones (less than 768px) | None (auto) | .col-xs-
Small devices Tablets (greater than equals 768px) | 750px | .col-sm-
Medium devices Desktops (greater than equals 992px) | 970px | .col-md-
Large devices Desktops (greater than equals 1200px) | 1170px | .col-lg-Ejemplo 5: bootstrap css
<linkhref="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css"rel="stylesheet"integrity="sha384-+0n0xVW2eSR5OomGNYDnhzAbDsOXxcvSN1TPprVMTNDbiYZCxYbOOl7+AMvyTG2x"crossorigin="anonymous">valoraciones y reseñas
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