picocss/scss/content/_table.scss

@use "sass:map";
@use "../settings" as *;

// Variables for striped rows
$color-dark: var(#{$css-var-prefix}table-row-stripped-background-color);
$color-light: var(#{$css-var-prefix}background-color);

// Adjust this number to control how many <tr hidden> rows are expected.
$hidden-levels: $hidden-table-levels;

// Do not change, or remove the following line
// needed this outside of the mixin to compile, idk why
// sass --version = 1.83.4 compiled with dart2js 3.6.1
$selector: "& ~ tr";

// This is the work around because the compiler changes
// :nth-child(odd of :not(:hidden))  to  :nth-child(oddof:not(:hidden))
// which makes the stripes fail.
// Mixin to handle the hidden row with striped backgrounds patterns
// Thanks Shaggy: https://stackoverflow.com/questions/3773890/zebra-striping-a-table-with-hidden-rows-using-css3/36892714#36892714
@mixin hidden-row-patterns($levels: 2, $dark-color: $color-dark, $light-color: $color-light) {
  $current-color-odd: $light-color;
  $current-color-even: $dark-color;
  // Generate nested s electors for each level
  $selector: "& ~ tr";

  &[hidden] {
    display: none;

    @for $i from 1 through $levels {
      @if $i > 1 {
        // Swap colors for next iteration
        $temp: $current-color-odd;
        $current-color-odd: $current-color-even;
        $current-color-even: $temp;

        // Add another level of nesting to the selector
        $selector: "#{$selector}[hidden] ~ tr";
      }
      #{$selector} {
        &:nth-child(odd) {
          > th,
          > td {
            background: $current-color-odd;
          }
        }

        &:nth-child(even) {
          > th,
          > td {
            background: $current-color-even;
          }
        }
      }
    }
  }
}

@if map.get($modules, "content/table") {
  /**
   * Table
   */

  // Reboot based on :
  // - normalize.css v8.0.1 | MIT License | github.com/necolas/normalize.css
  // - sanitize.css v13.0.0 | CC0 1.0 Universal | github.com/csstools/sanitize.css
  // ––––––––––––––––––––

  // 1. Collapse border spacing in all browsers (opinionated)
  // 2. Remove text indentation from table contents in Chrome, Edge, and Safari
  #{$parent-selector} :where(table) {
    width: 100%;
    border-collapse: collapse; // 1
    border-spacing: 0;
    text-indent: 0; // 2
  }

  // Pico
  // ––––––––––––––––––––

  // Cells
  #{$parent-selector} table th,
  #{$parent-selector} table td {
    padding: calc(var(#{$css-var-prefix}spacing) / 2) var(#{$css-var-prefix}spacing);
    border-bottom: var(#{$css-var-prefix}border-width)
      solid
      var(#{$css-var-prefix}table-border-color);
    background-color: var(#{$css-var-prefix}background-color);
    color: var(#{$css-var-prefix}color);
    font-weight: var(#{$css-var-prefix}font-weight);
    text-align: left;
    text-align: start;
  }

  #{$parent-selector} table > caption {
    margin-block: calc(var(#{$css-var-prefix}block-spacing-vertical) * 0.5);
    padding: calc(var(#{$css-var-prefix}spacing) / 2) var(#{$css-var-prefix}spacing);
    background-color: var(#{$css-var-prefix}table-row-stripped-background-color);
    color: var(#{$css-var-prefix}h3-color);
    font-weight: var(#{$css-var-prefix}font-weight);
    font-size: 1.25rem;
    text-align: center;
  }

  // Footer
  #{$parent-selector} table > tfoot {
    th,
    td {
      border-top: var(#{$css-var-prefix}border-width)
        solid
        var(#{$css-var-prefix}table-border-color);
      border-bottom: 0;
    }
  }

  #{$parent-selector} table > caption {
    margin-block: calc(var(#{$css-var-prefix}block-spacing-vertical) * 0.5);
    background-color: var(#{$css-var-prefix}table-row-stripped-background-color);
    color: var(#{$css-var-prefix}h3-color);
    font-weight: var(#{$css-var-prefix}font-weight);
    font-size: 1.25rem;
    text-align: center;
  }

  // Striped
  @if enable-classes {
    #{$parent-selector} table {
      &.striped {
        > tbody > tr {
          &:nth-child(odd) {
            > th,
            > td {
              background: $color-dark;
            }
          }

          &:nth-child(even) {
            > th,
            > td {
              background: $color-light;
            }
          }

          // Apply the hidden row patterns
          @include hidden-row-patterns($hidden-levels);
        }
      }
    }
  }
}