Menu
What is the difference among col-lg-* , col-md-* and col-sm-* in Twitter Bootstrap?
859
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)
col-sm- (small devices - screen width equal to or greater than 576px) . col-md- (medium devices - screen width equal to or greater than 768px)
The Bootstrap v4 grid system has five tiers of classes: xs (extra small), sm (small), md (medium), lg (large), and xl (extra large). You can use nearly any combination of these classes to create more dynamic and flexible layouts.
col-lg- stands for column large ≥ 1200px. col-md- stands for column medium ≥ 992px. col-xs- stands for column extra small ≥ 768px. The pixel numbers are the breakpoints, so for example col-xs is targeting the element when the window is smaller than 768px(likely mobile devices)...
Updated 2020...
In Bootstrap 5 (alpha) there is a new -xxl- size:
col-* - 0 (xs)col-sm-* - 576pxcol-md-* - 768pxcol-lg-* - 992pxcol-xl-* - 1200pxcol-xxl-* - 1400px
Bootstrap 5 Grid Demo
In Bootstrap 4 there is a new -xl- size, see this demo. Also the -xs- infix has been removed, so smallest columns are simply col-1, col-2.. col-12, etc..
col-* - 0 (xs)col-sm-* - 576pxcol-md-* - 768pxcol-lg-* - 992pxcol-xl-* - 1200px
Bootstrap 4 Grid Demo
Additionally, Bootstrap 4 includes new auto-layout columns. These also have responsive breakpoints (col, col-sm, col-md, etc..), but don't have defined % widths. Therefore, the auto-layout columns fill equal width across the row.
The Bootstrap 3 grid comes in 4 tiers (or "breakpoints")...
.col-xs-*).col-sm-*).col-md-*).col-lg-*).These grid sizes enable you to control grid behavior on different widths. The different tiers are controlled by CSS media queries.
So in Bootstrap's 12-column grid...
col-sm-3 is 3 of 12 columns wide (25%) on a typical small device width (> 768 pixels)
col-md-3 is 3 of 12 columns wide (25%) on a typical medium device width (> 992 pixels)
The smaller tier (xs, sm or md) also defines the size for larger screen widths. So, for the same size column on all tiers, just set the width for the smallest viewport...
<div class="col-lg-3 col-md-3 col-sm-3">..</div> is the same as,
<div class="col-sm-3">..</div>
Larger tiers are implied. Because col-sm-3 means 3 units on sm-and-up, unless specifically overridden by a larger tier that uses a different size.
xs(default) > overridden by sm > overridden by md > overridden by lg
Combine the classes to use change column widths on different grid sizes. This creates a responsive layout.
<div class="col-md-3 col-sm-6">..</div>
The sm, md and lg grids will all "stack" vertically on screens/viewports less than 768 pixels. This is where the xs grid fits in. Columns that use the col-xs-* classes will not stack vertically, and continue to scale down on the smallest screens.
Resize your browser using this demo and you'll see the grid scaling effects.
This article explains more about how the Bootstrap grid
92
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
