column-gap-decorations-037-ref.html

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<!DOCTYPE html>

<link rel="author" title="Javier Contreras" href="mailto:javiercon@microsoft.com">

<link rel="help" href="https://drafts.csswg.org/css-gaps-1/">

<link rel="help" href="https://drafts.csswg.org/css-grid-3/">

<style>

  body { margin: 0; }

  .lanes {

    display: grid-lanes;

    grid-template-columns: repeat(3, 100px);

    grid-lanes-pack: dense;

    flow-tolerance: 0;

    column-gap: 20px;

    row-gap: 16px;

    background: #cdd5e0;

    width: max-content;

  .lanes > div {

    background: #5b8def;

  .lanes > div.a { grid-column: 1; height: 24px; }

  .lanes > div.b { grid-column: 2; height: 88px; }

  .lanes > div.c { grid-column: 3; height: 240px; }

  .lanes > div.s { grid-column: 2 / span 2; height: 48px; background: #8a6df0; }

  .lanes > div.d { grid-column: 1 / span 2; height: 64px; background: #8a6df0; }

  .lanes > div.f { grid-column: 1; height: 40px; background: #1f9d6b; }

  .col-rule { position: absolute; width: 0; border-left: 4px solid blue; }

  .row-rule { position: absolute; height: 0; border-top: 4px solid gold; }

</style>

<div class="lanes">

  <div class="a"></div>

  <div class="b"></div>

  <div class="c"></div>

  <div class="s"></div>

  <div class="d"></div>

  <div class="f"></div>

</div>

<div class="col-rule" style="left: 108px; top: 0; height: 88px;"></div>

<div class="col-rule" style="left: 108px; top: 184px; height: 120px;"></div>

<div class="col-rule" style="left: 228px; top: 0; height: 240px;"></div>

<div class="row-rule" style="top: 30px; left: 0; width: 100px;"></div>

<div class="row-rule" style="top: 94px; left: 0; width: 100px;"></div>

<div class="row-rule" style="top: 94px; left: 120px; width: 100px;"></div>

<div class="row-rule" style="top: 246px; left: 120px; width: 100px;"></div>

<div class="row-rule" style="top: 246px; left: 240px; width: 100px;"></div>