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HTML

              
                <h1>Display the breakpoint using Sass </h1>
<h2>Helps to know which breakpoint you are in, and when you might need to make a change</h2>
<p>It is fixed to the bottom and scales with you as you resize your screen</p>

              
            
!

CSS

              
                // Media Queries
// 1. Name and define our breakpoints. Name the map something sensical
// 2. Write a comma separated list of key: value, pairs that we will use later
$breakpoints: (
		xsmall: 20em,
    small: 30em,
    medium: 40em,
	  large: 55em,
    xlarge: 70em
);

// This wider-than mixin will run through the above key value pairs and create our media queries.
// Usage example:
//
// .selector {
//		width: 100%;
//
//		@include wider-than(medium) {
//			width: 50%;
//		}
//	}

// if selector is wider than the screensize we are calling
@mixin wider-than($screen-size) {
	// and if our map that we named $breakpoints includes values (we called them $screen-size)
	@if map-has-key($breakpoints, $screen-size) {
		// then write out a nested Media Query that will target that value as our min-width
		@media (min-width: map-get($breakpoints, $screen-size)) {
	  		// write CSS within this mixin that would apply to only this breakpoint or above
				@content;
		}
	// if the screen-size we are requesting doesn't exist, then tell me when it is compiled
	} @else {
        // Debugging
        @warn "'#{$screen-size}' has not been declared as a breakpoint.";
    }
}

// Display Breakpoint During Development on Front end
@each $breakpoint, $screen-size in $breakpoints {	
	@media screen and (min-width: '#{$screen-size}') {
		body:before {
			content: '@include wider-than(#{$breakpoint}) // min-width: #{$screen-size}';
		}
	}
}

$background-color: rgba(50, 29, 103, .8);

// Could clean this up/automate it a little more but it was faster this way for now
body:before {
	background: $background-color;
	
	@include wider-than(xsmall) {
		background: lighten($background-color, 10%);
	}
	
	@include wider-than(small) {
		background: lighten($background-color, 20%);
	}

	@include wider-than(medium) {
		background: lighten($background-color, 30%);
	}

	@include wider-than(large) {
		background: lighten($background-color, 40%);
	}

	@include wider-than(xlarge) {
		background: lighten($background-color, 50%);
	}
}


// For design sake

@import url(https://fonts.googleapis.com/css?family=Josefin+Slab:700,300|Josefin+Sans:300);

body {
	background-color: #333;
	color: #fff;
	font-family: 'Josefin Slab', serif;
	font-size: 100%;
	line-height: 1;
	text-align: center;
}

body:before {
	bottom: 0;
	display: block;
	font-size: 1.4rem;
	padding: 1.5rem 0;
	position: fixed;
	width: 100%;
}

h1, h2, p {
		padding: 0 2rem;
}

h1 {
	font-size: 3rem;
	font-weight: 700;
	line-height: 1.2;
	margin: 2rem auto;
}

h2 {
	font-weight: 300;
	line-height: 1.3;
	margin: 0 auto 3rem;
}

p {
	font-family: 'Josefin Sans', sans-serif;
	font-size: 1.2rem;
	font-weight: 300;
	margin: 3rem auto;
}

              
            
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JS

              
                
              
            
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