tflori/3-way-switch.markdown

## 3-way-switch.markdown

      
    Raw
  

              3-way-switch.markdown
            
          
    3-way-switch

A Pen by Thomas Flori on CodePen.
License.

  
## index.html
<body>
  <div class=form-group>
    <label>user:edit</label>
    <div class=three-way-switch>
      <input type=radio id=user-edit-0 name=user:edit value=0>
      <label for=user-edit-0 class="left negative">revoke</label>
      <input type=radio id=user-edit-N name=user:edit value="" checked>
      <label for=user-edit-N class=icon>&#x25cf;</label>
      <input type=radio id=user-edit-1 name=user:edit value=1>
      <label for=user-edit-1 class="right positive">grant</label>
    </div>
  </div>
  <div class=form-group>
    <label>user:a</label>
    <div class=three-way-switch>
      <input type=radio id=user-a-0 name=user:a value=0>
      <label for=user-a-0 class="left negative">revoke</label>
      <input type=radio id=user-a-N name=user:a value="" checked>
      <label for=user-a-N class=icon>&#x25cf;</label>
      <input type=radio id=user-a-1 name=user:a value=1>
      <label for=user-a-1 class="right positive">grant</label>
    </div>
  </div>
</body>

## script.js
jQuery(function($) {
    $.fn.backgroundColor = function() {
      let styles = []
         .concat(...[...this[0].ownerDocument.styleSheets].map(s => [...s.cssRules||[]]))
         .filter(r => this[0].matches(r.selectorText));

      let backgroundColor = 'transparent';
      styles.map(function (style) {
        if (style.style.backgroundColor) {
          backgroundColor = style.style.backgroundColor
        }
      });
      return backgroundColor;
    };

    $('.three-way-switch').each(function () {
      const $selector = $('<div class=selector>');
      $(this).append($selector);
      $(this).find('label').css({
        'background': 'none',
        'box-shadow': 'none',
      });
    });


    $('.three-way-switch input').on('change', function () {
      if (!$(this).is(':checked')) {
        return;
      }

      let $next = $(this).next();
      let $selector = $(this).closest('.three-way-switch').find('.selector');
      $selector.css('left', $next.position().left);
      $selector.css('width', $next.outerWidth());
      $selector.css('background', $next.backgroundColor())
    }).trigger('change');

    $(window).on('resize', function () {
      $('.three-way-switch input').trigger('change');
    });
});

## scripts
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>

## style.scss
html *,body * { box-sizing: border-box; }

.form-group {
  display: flex;
  margin: 20px;

  > label {
    width: 200px;
  }
}

.three-way-switch {
  background: #f0f0f0;
  font-size: 10px;
  font-family: 'Open Sans', Roboto, sans-serif;
  border-radius: calc(1em + 4px);
  height: calc(2em + 4px);
  padding: 2px;
  position: relative;
  display: flex;

  input {
    position: absolute;
    opacity: 0;
    top: 0;
    left: 0;
    z-index: -1;
  }

  .selector {
    min-width: 2em;
    height: 2em;
    border-radius: 1em;
    transition: left 0.3s, background 0.3s, width 0.3s;
    position: absolute;
    z-index: 1;
    box-shadow: 0 4px 4px 0 rgba(0,0,0,0.2);
  }

  label {
    height: 2em;
    border-radius: 1em;
    line-height: 2em;
    padding: 0 1em;
    text-align: center;
    min-width: 2em;
    display: block;
    min-height: 2em;
    color: #555;
    cursor: pointer;
    background: none;
    text-transform: uppercase;
    transition: background 0.3s, color 0.3s;
    z-index: 2;

    &.icon {
      padding: 0;
    }
  }

  input:checked + label {
    background: #555;
    color: #fff;
    box-shadow: 0 4px 4px 0 rgba(0,0,0,0.2);

    &.positive {
      background: #393;
    }

    &.negative {
      background: #933;
    }
  }
}

@media (max-width: 800px) {
  .three-way-switch {
    font-size: 16px;
  }
}
	<body>
	<div class=form-group>
	<label>user:edit</label>
	<div class=three-way-switch>
	<input type=radio id=user-edit-0 name=user:edit value=0>
	<label for=user-edit-0 class="left negative">revoke</label>
	<input type=radio id=user-edit-N name=user:edit value="" checked>
	<label for=user-edit-N class=icon>●</label>
	<input type=radio id=user-edit-1 name=user:edit value=1>
	<label for=user-edit-1 class="right positive">grant</label>
	</div>
	</div>
	<div class=form-group>
	<label>user:a</label>
	<div class=three-way-switch>
	<input type=radio id=user-a-0 name=user:a value=0>
	<label for=user-a-0 class="left negative">revoke</label>
	<input type=radio id=user-a-N name=user:a value="" checked>
	<label for=user-a-N class=icon>●</label>
	<input type=radio id=user-a-1 name=user:a value=1>
	<label for=user-a-1 class="right positive">grant</label>
	</div>
	</div>
	</body>
	jQuery(function($) {
	$.fn.backgroundColor = function() {
	let styles = []
	.concat(...[...this[0].ownerDocument.styleSheets].map(s => [...s.cssRules\|\|[]]))
	.filter(r => this[0].matches(r.selectorText));

	let backgroundColor = 'transparent';
	styles.map(function (style) {
	if (style.style.backgroundColor) {
	backgroundColor = style.style.backgroundColor
	}
	});
	return backgroundColor;
	};

	$('.three-way-switch').each(function () {
	const $selector = $('<div class=selector>');
	$(this).append($selector);
	$(this).find('label').css({
	'background': 'none',
	'box-shadow': 'none',
	});
	});


	$('.three-way-switch input').on('change', function () {
	if (!$(this).is(':checked')) {
	return;
	}

	let $next = $(this).next();
	let $selector = $(this).closest('.three-way-switch').find('.selector');
	$selector.css('left', $next.position().left);
	$selector.css('width', $next.outerWidth());
	$selector.css('background', $next.backgroundColor())
	}).trigger('change');

	$(window).on('resize', function () {
	$('.three-way-switch input').trigger('change');
	});
	});
	html ,body { box-sizing: border-box; }

	.form-group {
	display: flex;
	margin: 20px;

	> label {
	width: 200px;
	}
	}

	.three-way-switch {
	background: #f0f0f0;
	font-size: 10px;
	font-family: 'Open Sans', Roboto, sans-serif;
	border-radius: calc(1em + 4px);
	height: calc(2em + 4px);
	padding: 2px;
	position: relative;
	display: flex;

	input {
	position: absolute;
	opacity: 0;
	top: 0;
	left: 0;
	z-index: -1;
	}

	.selector {
	min-width: 2em;
	height: 2em;
	border-radius: 1em;
	transition: left 0.3s, background 0.3s, width 0.3s;
	position: absolute;
	z-index: 1;
	box-shadow: 0 4px 4px 0 rgba(0,0,0,0.2);
	}

	label {
	height: 2em;
	border-radius: 1em;
	line-height: 2em;
	padding: 0 1em;
	text-align: center;
	min-width: 2em;
	display: block;
	min-height: 2em;
	color: #555;
	cursor: pointer;
	background: none;
	text-transform: uppercase;
	transition: background 0.3s, color 0.3s;
	z-index: 2;

	&.icon {
	padding: 0;
	}
	}

	input:checked + label {
	background: #555;
	color: #fff;
	box-shadow: 0 4px 4px 0 rgba(0,0,0,0.2);

	&.positive {
	background: #393;
	}

	&.negative {
	background: #933;
	}
	}
	}

	@media (max-width: 800px) {
	.three-way-switch {
	font-size: 16px;
	}
	}