2017年4月17日 · its the measure of how much column space each col takes on different screen sizes. xs -> extra small, sm -> small, md -> medium, lg -> large. See that each size totals up to 12(the number of columns the screen is divide into) –

2018年2月22日 · 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.

2015年4月24日 · I just stumbled on this while trying to gain clarity on the same topic, albeit for Bootstrap 4.. xs= 0 - 575.98 pixels (max-width 575.98) Extra small devices (portrait phones, less than 576px)

2014年6月12日 · md (for desktops) lg (for larger desktops) The classes above can be combined to create more dynamic and flexible layouts. Tip: Each class scales up, so if you wish to set the same widths for xs and sm, you only need to specify xs. OK, the answer is easy, but read on: col-lg-stands for column large ≥ 1200px col-md-stands for column medium ≥ ...

In other terms, if the user opens the site on a desktop, col-lg-3 means that a total of 4 cards will be displayed, when col-md-4 means a total of 3 cards, col-sm-6 a total of 2 cards and then col-xs-12 means on mobile only 1 card will with 100% width of the page.

2020年6月7日 · The only disadvantage is that if you want to specify the property w-md-50, it will work only on md not on xl or lg. So in order to make it work for devices greater than md. You have to do like this: w-xl-50 w-lg-50 w-md-50.

2018年2月5日 · As you can see in the picture, the first COL 12 should be long in the MD, in the LG only 9. In the LG, the right column should slide up, this way: Question: How can I realize this different grouping in Bootstrap 3? Or is there a trick without grouping by MD/LG? Example Code XS-MD: OK. BUT LG: the right column (News) does not slip up.

2014年6月6日 · I need to make a image change it's size if the viewer has a smartphone or a PC. This achieves what I want but it's a bad way to do it because of loading the img 4 times and it's redundant: <div...

2017年2月5日 · col-md-* medium >= 992 px. col-lg-* large >= 1200 px. Em relação a pergunta : Em que circunstâncias devem ser usadas ? Por se tratar de layout, é amplo responder, mas no geral quando vc quer um grid que se adapte a esses padrões de breakpoints. E o uso inapropriado, o único problema é no seu layout.

2017年5月28日 · Bootstrap does not document the media queries very well. Those variables of @screen-sm, @screen-md, @screen-lg are actually referring to LESS variables and not simple CSS. When you customize Bootstrap you can change the media query breakpoints and when it compiles the @screen-xx variables are changed to whatever pixel width you defined as ...