scss 覆盖默认的引导行为以包装行，并添加一个帮助类“col-centered”以使任何大小的列居中

Posted 2021-05-18

/**
 *
 * Bootstrap Overrides
 *
 */

.col-centered{
    float: none;
    margin: 0 auto;
}

/*  Bootstrap Clearfix */
/*  Tablet  */
@media (min-width:767px){

  /* Column clear fix */
  .col-lg-1:nth-child(12n+1),
  .col-lg-2:nth-child(6n+1),
  .col-lg-3:nth-child(4n+1),
  .col-lg-4:nth-child(3n+1),
  .col-lg-6:nth-child(2n+1),
  .col-md-1:nth-child(12n+1),
  .col-md-2:nth-child(6n+1),
  .col-md-3:nth-child(4n+1),
  .col-md-4:nth-child(3n+1),
  .col-md-6:nth-child(2n+1){
    clear: none;
  }
  .col-sm-1:nth-child(12n+1),
  .col-sm-2:nth-child(6n+1),
  .col-sm-3:nth-child(4n+1),
  .col-sm-4:nth-child(3n+1),
  .col-sm-6:nth-child(2n+1){
    clear: left;
  }
}


/*  Medium Desktop  */
@media (min-width:992px){

  /* Column clear fix */
  .col-lg-1:nth-child(12n+1),
  .col-lg-2:nth-child(6n+1),
  .col-lg-3:nth-child(4n+1),
  .col-lg-4:nth-child(3n+1),
  .col-lg-6:nth-child(2n+1),
  .col-sm-1:nth-child(12n+1),
  .col-sm-2:nth-child(6n+1),
  .col-sm-3:nth-child(4n+1),
  .col-sm-4:nth-child(3n+1),
  .col-sm-6:nth-child(2n+1){
    clear: none;
  }
  .col-md-1:nth-child(12n+1),
  .col-md-2:nth-child(6n+1),
  .col-md-3:nth-child(4n+1),
  .col-md-4:nth-child(3n+1),
  .col-md-6:nth-child(2n+1){
    clear: left;
  }
}


/*  Large Desktop  */
@media (min-width:1200px){

  /* Column clear fix */
  .col-md-1:nth-child(12n+1),
  .col-md-2:nth-child(6n+1),
  .col-md-3:nth-child(4n+1),
  .col-md-4:nth-child(3n+1),
  .col-md-6:nth-child(2n+1),
  .col-sm-1:nth-child(12n+1),
  .col-sm-2:nth-child(6n+1),
  .col-sm-3:nth-child(4n+1),
  .col-sm-4:nth-child(3n+1),
  .col-sm-6:nth-child(2n+1){
    clear: none;
  }
  .col-lg-1:nth-child(12n+1),
  .col-lg-2:nth-child(6n+1),
  .col-lg-3:nth-child(4n+1),
  .col-lg-4:nth-child(3n+1),
  .col-lg-6:nth-child(2n+1){
    clear: left;
  }
}