bootstrap row class css code example
Example 1: bootstrap grid
<div class="container">
<div class="row">
<div class="col-sm">
One of three columns
</div>
<div class="col-sm">
One of three columns
</div>
<div class="col-sm">
One of three columns
</div>
</div>
</div>
Example 2: 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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<div class="container-sm">100% wide until small breakpoint</div>
<div class="container-md">100% wide until medium breakpoint</div>
<div class="container-lg">100% wide until large breakpoint</div>
<div class="container-xl">100% wide until extra large breakpoint</div>
@media (min-width: 576px) { ... }
@media (min-width: 768px) { ... }
@media (min-width: 992px) { ... }
@media (min-width: 1200px) { ... }
Since we write our source CSS in Sass, all our media queries are available via Sass mixins:
@include media-breakpoint-up(sm) { ... }
@include media-breakpoint-up(md) { ... }
@include media-breakpoint-up(lg) { ... }
@include media-breakpoint-up(xl) { ... }
.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):
@media (max-width: 575.98px) { ... }
@media (max-width: 767.98px) { ... }
@media (max-width: 991.98px) { ... }
@media (max-width: 1199.98px) { ... }
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) { ... }
@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;
Example 3: row class in bootstrap
<div class="row">
<div class="col-md-6"></div>
<div class="col-md-4"></div>
<div class="col-md-2"></div>
</div>
Example 4: bootstrap grid
<!----------------------- BOOTSTRAP GRID SYSTEM ------------------------>
This code will create 4 boxes placed side by side, which will be
dynamically positioned, according to the size of the screen. We define
the following behavior:
<!-- Desktop Display: we have 4 columns per row (each occupies 3 units out of 12) -->
class = "col-lg-3" <!-- display large with 12/3 = 4 columns -->
<!-- Tablet Display: we have 3 columns per row (each occupies 4 units out of 12) -->
class = "col-md-4" <!-- display medium with 12/4 = 3 columns -->
<!-- Mobile Display: we have 2 columns per row (each occupies the 6 units of 12) -->
class = "col-sm-6" <!-- display small with 12/6 = 2 columns -->
<!-- CODE -->
<div class="row">
<div class="col-lg-3 col-md-4 col-sm-6" style="background-color:red; border:1px solid black;">
One of four columns
</div>
<div class="col-lg-3 col-md-4 col-sm-6" style="background-color:yellow; border:1px solid black;">
One of four columns
</div>
<div class="col-lg-3 col-md-4 col-sm-6" style="background-color:green; border:1px solid black;">
One of four columns
</div>
<div class="col-lg-3 col-md-4 col-sm-6" style="border:1px solid black;">
One of four columns
</div>
</div>
Example 5: .row bootstrap
.row{
display: flex;
flex-wrap: wrap;
margin-right: -15px;
margin-left: -15px;
}
Example 6: bootstrap container width
--------------------------------------------------------------------------------------
Bootstrap Container Width | Size | Class Prefix
--------------------------------------------------------------------------------------
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-