altsanz/css-tips

Those tips that I find useful to keep bookmarked

css-tips

Those tips that I find useful to keep bookmarked

Equal column heights

Disclaimer: Better use Flexbox if possible

CSS tools for Bootstrap 3.

Extracted from http://www.minimit.com/articles/solutions-tutorials/bootstrap-3-responsive-columns-of-same-height

Markup

The very basic

The content must be inside a container, we call it with the class .inside, it's inside each column. You have to add a div with the class .row-height inside the row, and also add .col-height to the columns.

Restricting by media query

Just use the responsive .row-height and .col-height classes: for example .row-sm-height with .col-sm-height

Choose vertical alignment inside each column

Use the classes .col-top or .col-middle or .col-bottom, or theirs respective responsive classes.

Demo

http://www.minimit.com/demos/bootstrap-3-responsive-columns-of-same-height

Toolkit

CSS to be added in order to use these magic features:

/* USAGE
<div class="row">
  <div class="row-height">
    <div class="col-xs-2 col-xs-height col-xs-middle">
      <div class="inside"></div>
    </div>
    <div class="col-xs-4 col-lg-5 col-xs-height col-xs-middle">
      <div class="inside"></div>
    </div>
  </div>
</div>
*/

/* content styles */

.inside {
  margin-top: 20px;
  margin-bottom: 20px;
  background: #ededed;
  background: -webkit-gradient(linear, left top, left bottom,color-stop(0%, #f4f4f4), color-stop(100%, #ededed));
  background: -moz-linear-gradient(top, #f4f4f4 0%, #ededed 100%);
  background: -ms-linear-gradient(top, #f4f4f4 0%, #ededed 100%);
}
.inside-full-height {
  /*
  // if you want to give content full height give him height: 100%;
  // with content full height you can't apply margins to the content
  // content full height does not work in ie http://stackoverflow.com/questions/27384433/ie-display-table-cell-child-ignores-height-100
  */
  height: 100%;
  margin-top: 0;
  margin-bottom: 0;
}

/* columns of same height styles */

.row-height {
  display: table;
  table-layout: fixed;
  height: 100%;
  width: 100%;
}
.col-height {
  display: table-cell;
  float: none;
  height: 100%;
}
.col-top {
  vertical-align: top;
}
.col-middle {
  vertical-align: middle;
}
.col-bottom {
  vertical-align: bottom;
}

@media (min-width: 480px) {
  .row-xs-height {
    display: table;
    table-layout: fixed;
    height: 100%;
    width: 100%;
  }
  .col-xs-height {
    display: table-cell;
    float: none;
    height: 100%;
  }
  .col-xs-top {
    vertical-align: top;
  }
  .col-xs-middle {
    vertical-align: middle;
  }
  .col-xs-bottom {
    vertical-align: bottom;
  }
}

@media (min-width: 768px) {
  .row-sm-height {
    display: table;
    table-layout: fixed;
    height: 100%;
    width: 100%;
  }
  .col-sm-height {
    display: table-cell;
    float: none;
    height: 100%;
  }
  .col-sm-top {
    vertical-align: top;
  }
  .col-sm-middle {
    vertical-align: middle;
  }
  .col-sm-bottom {
    vertical-align: bottom;
  }
}

@media (min-width: 992px) {
  .row-md-height {
    display: table;
    table-layout: fixed;
    height: 100%;
    width: 100%;
  }
  .col-md-height {
    display: table-cell;
    float: none;
    height: 100%;
  }
  .col-md-top {
    vertical-align: top;
  }
  .col-md-middle {
    vertical-align: middle;
  }
  .col-md-bottom {
    vertical-align: bottom;
  }
}

@media (min-width: 1200px) {
  .row-lg-height {
    display: table;
    table-layout: fixed;
    height: 100%;
    width: 100%;
  }
  .col-lg-height {
    display: table-cell;
    float: none;
    height: 100%;
  }
  .col-lg-top {
    vertical-align: top;
  }
  .col-lg-middle {
    vertical-align: middle;
  }
  .col-lg-bottom {
    vertical-align: bottom;
  }
}

Improving animating performance

There are very few CSS properties that can be animated without constantly triggering repaints for every frame, namely opacity and transform. We minimize the amount of repaints (and work that your browser has to do) by sticking to only changing these two properties during the animation.

• Source: http://tobiasahlin.com/blog/how-to-animate-box-shadow/

Hint: Try using pseudo-elements and opacity.