Examples

This page provides practical examples of using postcss-logical-polyfill in various scenarios and CSS patterns.

Basic Examples

Simple Margin and Padding

/* Input CSS */
.container {
  margin-inline: 1rem 2rem;
  padding-block: 1rem;
  padding-inline-start: 0.5rem;
}

/* Output CSS */
[dir="ltr"] .container {
  margin-left: 1rem;
  margin-right: 2rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
  padding-left: 0.5rem;
}

[dir="rtl"] .container {
  margin-left: 2rem;
  margin-right: 1rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
  padding-right: 0.5rem;
}

Border Properties

/* Input CSS */
.card {
  border-inline: 2px solid blue;
  border-block-start: 1px solid gray;
  border-start-start-radius: 8px;
  border-end-end-radius: 8px;
}

/* Output CSS */
[dir="ltr"] .card {
  border-left: 2px solid blue;
  border-right: 2px solid blue;
  border-top: 1px solid gray;
  border-top-left-radius: 8px;
  border-bottom-right-radius: 8px;
}

[dir="rtl"] .card {
  border-left: 2px solid blue;
  border-right: 2px solid blue;
  border-top: 1px solid gray;
  border-top-right-radius: 8px;
  border-bottom-left-radius: 8px;
}

Layout Examples

Flexbox Layout

/* Input CSS */
.flex-container {
  display: flex;
  gap: 1rem;
  padding-inline: 2rem;
  margin-block: 1rem;
}

.flex-item {
  margin-inline-end: auto;
  padding-inline-start: 1rem;
  border-inline-start: 3px solid #007acc;
}

/* Output CSS */
[dir="ltr"] .flex-container {
  display: flex;
  gap: 1rem;
  padding-left: 2rem;
  padding-right: 2rem;
  margin-top: 1rem;
  margin-bottom: 1rem;
}

[dir="ltr"] .flex-item {
  margin-right: auto;
  padding-left: 1rem;
  border-left: 3px solid #007acc;
}

[dir="rtl"] .flex-container {
  display: flex;
  gap: 1rem;
  padding-left: 2rem;
  padding-right: 2rem;
  margin-top: 1rem;
  margin-bottom: 1rem;
}

[dir="rtl"] .flex-item {
  margin-left: auto;
  padding-right: 1rem;
  border-right: 3px solid #007acc;
}

Grid Layout

/* Input CSS */
.grid-container {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 1rem;
  padding-inline: 2rem;
  margin-block: 2rem;
}

.grid-sidebar {
  padding-inline-end: 1rem;
  border-inline-end: 1px solid #ddd;
}

.grid-content {
  padding-inline-start: 1rem;
  max-inline-size: 800px;
}

/* Output CSS */
[dir="ltr"] .grid-container {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 1rem;
  padding-left: 2rem;
  padding-right: 2rem;
  margin-top: 2rem;
  margin-bottom: 2rem;
}

[dir="ltr"] .grid-sidebar {
  padding-right: 1rem;
  border-right: 1px solid #ddd;
}

[dir="ltr"] .grid-content {
  padding-left: 1rem;
  max-width: 800px;
}

[dir="rtl"] .grid-container {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 1rem;
  padding-left: 2rem;
  padding-right: 2rem;
  margin-top: 2rem;
  margin-bottom: 2rem;
}

[dir="rtl"] .grid-sidebar {
  padding-left: 1rem;
  border-left: 1px solid #ddd;
}

[dir="rtl"] .grid-content {
  padding-right: 1rem;
  max-width: 800px;
}

Component Examples

Navigation Bar

/* Input CSS */
.navbar {
  display: flex;
  align-items: center;
  padding-inline: 2rem;
  border-block-end: 1px solid #e5e5e5;
}

.navbar-brand {
  margin-inline-end: auto;
  font-size: 1.25rem;
  font-weight: bold;
}

.navbar-nav {
  display: flex;
  gap: 1rem;
  margin-inline-start: 2rem;
}

.navbar-item {
  padding-inline: 0.75rem;
  border-inline-start: 2px solid transparent;
}

.navbar-item:hover {
  border-inline-start-color: #007acc;
}

/* Output CSS */
[dir="ltr"] .navbar {
  display: flex;
  align-items: center;
  padding-left: 2rem;
  padding-right: 2rem;
  border-bottom: 1px solid #e5e5e5;
}

[dir="ltr"] .navbar-brand {
  margin-right: auto;
  font-size: 1.25rem;
  font-weight: bold;
}

[dir="ltr"] .navbar-nav {
  display: flex;
  gap: 1rem;
  margin-left: 2rem;
}

[dir="ltr"] .navbar-item {
  padding-left: 0.75rem;
  padding-right: 0.75rem;
  border-left: 2px solid transparent;
}

[dir="ltr"] .navbar-item:hover {
  border-left-color: #007acc;
}

[dir="rtl"] .navbar {
  display: flex;
  align-items: center;
  padding-left: 2rem;
  padding-right: 2rem;
  border-bottom: 1px solid #e5e5e5;
}

[dir="rtl"] .navbar-brand {
  margin-left: auto;
  font-size: 1.25rem;
  font-weight: bold;
}

[dir="rtl"] .navbar-nav {
  display: flex;
  gap: 1rem;
  margin-right: 2rem;
}

[dir="rtl"] .navbar-item {
  padding-left: 0.75rem;
  padding-right: 0.75rem;
  border-right: 2px solid transparent;
}

[dir="rtl"] .navbar-item:hover {
  border-right-color: #007acc;
}

Card Component

/* Input CSS */
.card {
  border-radius: 8px;
  border: 1px solid #e5e5e5;
  overflow: hidden;
  margin-block: 1rem;
}

.card-header {
  padding-inline: 1.5rem;
  padding-block: 1rem;
  border-block-end: 1px solid #e5e5e5;
  background-color: #f8f9fa;
}

.card-body {
  padding-inline: 1.5rem;
  padding-block: 1.5rem;
}

.card-footer {
  padding-inline: 1.5rem;
  padding-block: 0.75rem;
  border-block-start: 1px solid #e5e5e5;
  background-color: #f8f9fa;
  text-align: end;
}

.card-button {
  margin-inline-start: 0.5rem;
  padding-inline: 1rem;
  padding-block: 0.5rem;
  border: none;
  border-radius: 4px;
  background-color: #007acc;
  color: white;
}

/* Output CSS */
[dir="ltr"] .card {
  border-radius: 8px;
  border: 1px solid #e5e5e5;
  overflow: hidden;
  margin-top: 1rem;
  margin-bottom: 1rem;
}

[dir="ltr"] .card-header {
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid #e5e5e5;
  background-color: #f8f9fa;
}

[dir="ltr"] .card-body {
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
}

[dir="ltr"] .card-footer {
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
  border-top: 1px solid #e5e5e5;
  background-color: #f8f9fa;
  text-align: right;
}

[dir="ltr"] .card-button {
  margin-left: 0.5rem;
  padding-left: 1rem;
  padding-right: 1rem;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
  border: none;
  border-radius: 4px;
  background-color: #007acc;
  color: white;
}

[dir="rtl"] .card {
  border-radius: 8px;
  border: 1px solid #e5e5e5;
  overflow: hidden;
  margin-top: 1rem;
  margin-bottom: 1rem;
}

[dir="rtl"] .card-header {
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid #e5e5e5;
  background-color: #f8f9fa;
}

[dir="rtl"] .card-body {
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
}

[dir="rtl"] .card-footer {
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
  border-top: 1px solid #e5e5e5;
  background-color: #f8f9fa;
  text-align: left;
}

[dir="rtl"] .card-button {
  margin-right: 0.5rem;
  padding-left: 1rem;
  padding-right: 1rem;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
  border: none;
  border-radius: 4px;
  background-color: #007acc;
  color: white;
}

Advanced Examples

Positioning with Inset

/* Input CSS */
.modal {
  position: fixed;
  inset-block-start: 10vh;
  inset-inline: 10vw;
  max-block-size: 80vh;
  max-inline-size: 80vw;
  background: white;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.tooltip {
  position: absolute;
  inset-block-end: 100%;
  inset-inline-start: 50%;
  transform: translateX(-50%);
  margin-block-end: 0.5rem;
}

/* Output CSS */
[dir="ltr"] .modal {
  position: fixed;
  top: 10vh;
  left: 10vw;
  right: 10vw;
  max-height: 80vh;
  max-width: 80vw;
  background: white;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

[dir="ltr"] .tooltip {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-bottom: 0.5rem;
}

[dir="rtl"] .modal {
  position: fixed;
  top: 10vh;
  left: 10vw;
  right: 10vw;
  max-height: 80vh;
  max-width: 80vw;
  background: white;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

[dir="rtl"] .tooltip {
  position: absolute;
  bottom: 100%;
  right: 50%;
  transform: translateX(50%);
  margin-bottom: 0.5rem;
}

Float and Clear with Logical Values

/* Input CSS */
.sidebar {
  float: inline-start;
  inline-size: 250px;
  margin-inline-end: 2rem;
  padding-inline: 1rem;
}

.main-content {
  overflow: hidden; /* Creates new block formatting context */
}

.clear-float {
  clear: inline-start;
}

/* Output CSS */
[dir="ltr"] .sidebar {
  float: left;
  width: 250px;
  margin-right: 2rem;
  padding-left: 1rem;
  padding-right: 1rem;
}

[dir="ltr"] .main-content {
  overflow: hidden;
}

[dir="ltr"] .clear-float {
  clear: left;
}

[dir="rtl"] .sidebar {
  float: right;
  width: 250px;
  margin-left: 2rem;
  padding-left: 1rem;
  padding-right: 1rem;
}

[dir="rtl"] .main-content {
  overflow: hidden;
}

[dir="rtl"] .clear-float {
  clear: right;
}

Text Alignment

/* Input CSS */
.header {
  text-align: start;
  padding-inline: 2rem;
}

.footer {
  text-align: end;
  padding-inline: 2rem;
}

.centered {
  text-align: center;
  margin-inline: auto;
  max-inline-size: 600px;
}

/* Output CSS */
[dir="ltr"] .header {
  text-align: left;
  padding-left: 2rem;
  padding-right: 2rem;
}

[dir="ltr"] .footer {
  text-align: right;
  padding-left: 2rem;
  padding-right: 2rem;
}

[dir="ltr"] .centered {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
  max-width: 600px;
}

[dir="rtl"] .header {
  text-align: right;
  padding-left: 2rem;
  padding-right: 2rem;
}

[dir="rtl"] .footer {
  text-align: left;
  padding-left: 2rem;
  padding-right: 2rem;
}

[dir="rtl"] .centered {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
  max-width: 600px;
}

Experimental Properties

Overflow Properties

/* Input CSS (requires experimental: true) */
.scroll-container {
  block-size: 300px;
  inline-size: 100%;
  overflow-block: auto;
  overflow-inline: hidden;
}

.content {
  min-block-size: 500px;
  min-inline-size: 800px;
}

/* Output CSS */
.scroll-container {
  height: 300px;
  width: 100%;
  overflow-y: auto;
  overflow-x: hidden;
}

.content {
  min-height: 500px;
  min-width: 800px;
}

Container Queries with Logical Properties

/* Input CSS (requires experimental: true) */
.container {
  container-type: inline-size;
  padding-inline: 1rem;
}

.card {
  contain-intrinsic-inline-size: 300px;
  contain-intrinsic-block-size: 200px;
  margin-block: 1rem;
}

@container (min-width: 500px) {
  .card {
    padding-inline: 2rem;
    margin-inline: 1rem;
  }
}

/* Output CSS */
.container {
  container-type: inline-size;
  padding-left: 1rem;
  padding-right: 1rem;
}

.card {
  contain-intrinsic-width: 300px;
  contain-intrinsic-height: 200px;
  margin-top: 1rem;
  margin-bottom: 1rem;
}

@container (min-width: 500px) {
  [dir="ltr"] .card {
    padding-left: 2rem;
    padding-right: 2rem;
    margin-left: 1rem;
    margin-right: 1rem;
  }

  [dir="rtl"] .card {
    padding-left: 2rem;
    padding-right: 2rem;
    margin-left: 1rem;
    margin-right: 1rem;
  }
}

Real-World Use Cases

Form Layout

/* Input CSS */
.form-group {
  margin-block: 1rem;
}

.form-label {
  display: block;
  margin-block-end: 0.25rem;
  font-weight: 500;
}

.form-input {
  inline-size: 100%;
  padding-inline: 0.75rem;
  padding-block: 0.5rem;
  border: 1px solid #ccc;
  border-radius: 4px;
}

.form-input:focus {
  outline: none;
  border-color: #007acc;
  box-shadow: 0 0 0 2px rgba(0, 122, 204, 0.25);
}

.form-help {
  font-size: 0.875rem;
  color: #666;
  margin-block-start: 0.25rem;
}

.form-error {
  color: #dc3545;
  font-size: 0.875rem;
  margin-block-start: 0.25rem;
}

.form-actions {
  margin-block-start: 2rem;
  text-align: end;
}

.form-button {
  padding-inline: 1rem;
  padding-block: 0.5rem;
  margin-inline-start: 0.5rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

This comprehensive examples page demonstrates how postcss-logical-polyfill transforms various CSS patterns, making them work across different text directions while maintaining clean, logical code.