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A bottom navigation bar adhering to the Material Design specification.
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README.md

material-bottom-nav

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A bottom navigation bar adhering to the Material Design specification. It is written purely using Sass mixins which allow you to apply the style rules to any class, as shown in the demo page's stylesheet.

A running demonstration can be found here.

Three actions Five actions, hidden labels



Installation

Install the package via npm:

npm install --save material-bottom-nav

Then import the Sass mixin:

@import '~material-bottom-nav';

Usage

Apply the the mixin to a class:

.bottom-nav {
  @include bottom-nav($background-color: #009688, $active-color: #FFFFFF, $inactive-color: #E0E0E0, $hide-inactive-labels: true);
}

The $hide-inactive-labels argument defaults to false. It is used to hide the text label of any inactive actions, as suggested by the style specification if you have more than three actions visible.

Given the example above the mixin will register a set of style rules that adhere to the “Block Element Modifier” methodology:

  • .bottom-nav
  • .bottom-nav__action
    • An individual navigation action.
  • .bottom-nav__action--active
    • A modifier class to indiciate that the action is the currently active.
  • .bottom-nav__icon
    • The SVG icon for an action.
  • .bottom-nav__label
    • The text label for an action.

The DOM structure for the component should follow the heirarchy as shown below:

<nav class="bottom-nav">
  <a class="bottom-nav__action" href="#">
    <svg class="bottom-nav__icon" viewBox="0 0 24 24">
      <path d="M11,7V12.11L15.71,14.9L16.5,13.62L12.5,11.25V7M12.5,2C8.97,2 5.91,3.92 4.27,6.77L2,4.5V11H8.5L5.75,8.25C6.96,5.73 9.5,4 12.5,4A7.5,7.5 0 0,1 20,11.5A7.5,7.5 0 0,1 12.5,19C9.23,19 6.47,16.91 5.44,14H3.34C4.44,18.03 8.11,21 12.5,21C17.74,21 22,16.75 22,11.5A9.5,9.5 0 0,0 12.5,2Z"></path>
    </svg>
    <span class="bottom-nav__label">Recents</span>
  </a>

  <a class="bottom-nav__action bottom-nav__action--active" href="#">
    <svg class="bottom-nav__icon" viewBox="0 0 24 24">
      <path d="M12,21.35L10.55,20.03C5.4,15.36 2,12.27 2,8.5C2,5.41 4.42,3 7.5,3C9.24,3 10.91,3.81 12,5.08C13.09,3.81 14.76,3 16.5,3C19.58,3 22,5.41 22,8.5C22,12.27 18.6,15.36 13.45,20.03L12,21.35Z"></path>
    </svg>
    <span class="bottom-nav__label">Favorites</span>
  </a>

  <a class="bottom-nav__action" href="#">
    <svg class="bottom-nav__icon" viewBox="0 0 24 24">
      <path d="M12,20A8,8 0 0,1 4,12A8,8 0 0,1 12,4A8,8 0 0,1 20,12A8,8 0 0,1 12,20M12,2A10,10 0 0,0 2,12A10,10 0 0,0 12,22A10,10 0 0,0 22,12A10,10 0 0,0 12,2M12,12.5A1.5,1.5 0 0,1 10.5,11A1.5,1.5 0 0,1 12,9.5A1.5,1.5 0 0,1 13.5,11A1.5,1.5 0 0,1 12,12.5M12,7.2C9.9,7.2 8.2,8.9 8.2,11C8.2,14 12,17.5 12,17.5C12,17.5 15.8,14 15.8,11C15.8,8.9 14.1,7.2 12,7.2Z"></path>
    </svg>
    <span class="bottom-nav__label">Nearby</span>
  </a>
</nav>

The example above includes icons from the Material Design Icons project (LICENSE).

Customization

The box-model and colors of the individual styles within this component can be configured by overriding the default variable values defined in bottom-nav.scss. Remember to define your overrides before importing the mixin file, for example:

$bottom-nav-action-horizontal-margin: 4px; // reduce the horizontal gutter between actions
$bottom-nav-icon-font-size: 28px; // increase the icon size

@import '~material-bottom-nav';

.bottom-nav {
  @include bottom-nav(#009688, #FFFFFF, #E0E0E0);
}

Contributing

Bug reports and pull requests are welcome on GitHub.

License

This project is available under the terms of the ISC license. See the LICENSE file for the copyright information and licensing terms.

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