css - How to have media query widths apply to preset bootstrap xs sm md lg column classes? -

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For the bootstrap, the existing widths that are created in the classes themselves are cutoffs (for example, col-xs-3,

col-sm-8, col-md-10, col-lg-1). These classes are already preset for cutoffs of 768 99 99, and 1024px.

If you define your own cutoff point through Media Queries, how do you determine that the preset class like col-xs-3 is actually the media queries As soon as the specified cutoffs are closed on? @ Media only screen and (minimum-width: 300px) and (max-width: 600px) {// your code content} @ media only screen and (minimum-width: 600px) and (Max-width: 900 pix) {// your code stuff} @ media only screen and (minimum-width: 900 pixels) {// your code stuff}

how do you do Are these cutoff points defined in the media quarters, which in fact are Colonel-X, SM-MD, LG etc. Area is consistent? Or is there a better way to go about it?

These values ​​(break points) $ screen-sm-min , < Code> $ screen-MD-min and $ screen-LG-Min bootstrap variable in variables.less file.

When you change your break point, you will also need to change the container width. I suggest you use the following formula to do this: 

  $ container- * : Floor (($ screen- $ $ -grid-gutter-width) / $ grid-columns) * $ grid column + $ grid-drain-width;   
 Also see:  
 And at the end you probably should also take into account. The  variables.less  file has also been declared as follows:  
  // ** which gets useless again $ grid-float-breakpoint: $ screen -sm-min! Default;   
 
 How do you build a custom build using Rail Shipping?   
 Also see:  
 
 You need to add a Bootstrap-Asus gem to your Jefffile, and make sure that & gt; The sass-rails gem is present - this is added by default to new rail applications.   
 And then: Import "bootstrap-sprockets" should be imported before "Bootstrap" and "Bootstrap / Variables".  Apps / assets / stylesheets / apps. Scss  @ import "bootstrap-sprockets"; $ Screen- SM-min: 300px; $ Container-SM: Flooring (($ screen-sm $ $ grid-drain-width) / $ grid-column) * $ grid-column + $ grid-drain-width; $ Screen- md-min: 600px; $ Container-md: floor (($ screen-md-$ grid-drain-width) / $ grid-column) * $ grid-column + $ grid-drain-width; $ Screen- lg-min: 900px; $ Container-LG: floor (($ screen-LG - $ grid-drain-width) / $ grid-column) * $ grid-column + $ grid-drain-width; @ Import "bootstrap";   
 Bootstrap code is built with a mobile first approach. The  xs  grid is default and does not require any media queries. Then the  sm  grid is for screen widths greater than  $ screen-sm-min  and so on. You do not need to set the  max-width  media query.

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