/CSS/.sidebar { --offset: 2rem; flex-grow: 1; flex-basis: 300px; align-self: start; position: sticky; top: var(--offset); }

.sidebar { --offset: 2rem; flex-grow: 1; flex-basis: 300px; align-self: start; position: sticky; top: var(--offset); }

/* Sticky Sidebar */
.sidebar {
  --offset: 2rem;
  flex-grow: 1;
  flex-basis: 300px;
  align-self: start;
  position: sticky;
  top: var(--offset);
}

Source: css-tricks.com

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