no-gutter bootstrap 4
<div class="row no-gutters">
<div class="col-12 col-sm-6 col-md-8">.col-12 .col-sm-6 .col-md-8</div>
<div class="col-6 col-md-4">.col-6 .col-md-4</div>
</div>
no-gutter bootstrap 4
<div class="row no-gutters">
<div class="col-12 col-sm-6 col-md-8">.col-12 .col-sm-6 .col-md-8</div>
<div class="col-6 col-md-4">.col-6 .col-md-4</div>
</div>
bootstrap screen sizes
The Bootstrap grid system has four classes:
xs (for phones - screens less than 768px wide)
sm (for tablets - screens equal to or greater than 768px wide)
md (for small laptops - screens equal to or greater than 992px wide)
lg (for laptops and desktops - screens equal to or greater than 1200px wide)
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>
boostrap grid
<div class="row">
<div class="col-9">.col-9</div>
<div class="col-4">.col-4<br>Since 9 + 4 = 13 > 12, this 4-column-wide div gets wrapped onto a new line as one contiguous unit.</div>
<div class="col-6">.col-6<br>Subsequent columns continue along the new line.</div>
</div>
boostrap grid
<div class="row">
<div class="col-6 col-sm-4">.col-6 .col-sm-4</div>
<div class="col-6 col-sm-4">.col-6 .col-sm-4</div>
<!-- Force next columns to break to new line at md breakpoint and up -->
<div class="w-100 d-none d-md-block"></div>
<div class="col-6 col-sm-4">.col-6 .col-sm-4</div>
<div class="col-6 col-sm-4">.col-6 .col-sm-4</div>
</div>
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