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_background.scss
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_background.scss
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//************************************************************************//
// Background property for adding multiple backgrounds using shorthand
// notation.
//************************************************************************//
@mixin background(
$background-1 , $background-2: false,
$background-3: false, $background-4: false,
$background-5: false, $background-6: false,
$background-7: false, $background-8: false,
$background-9: false, $background-10: false,
$fallback: false
) {
$backgrounds: compact($background-1, $background-2,
$background-3, $background-4,
$background-5, $background-6,
$background-7, $background-8,
$background-9, $background-10);
$fallback-color: false;
@if (type-of($fallback) == color) or ($fallback == "transparent") {
$fallback-color: $fallback;
}
@else {
$fallback-color: extract-background-color($backgrounds);
}
@if $fallback-color {
background-color: $fallback-color;
}
background: background-add-prefix($backgrounds, webkit);
background: background-add-prefix($backgrounds, moz);
background: background-add-prefix($backgrounds, ms);
background: background-add-prefix($backgrounds, o);
background: background-add-prefix($backgrounds);
}
@function extract-background-color($backgrounds) {
$final-bg-layer: nth($backgrounds, length($backgrounds));
@if type-of($final-bg-layer) == list {
@for $i from 1 through length($final-bg-layer) {
$value: nth($final-bg-layer, $i);
@if type-of($value) == color {
@return $value;
}
}
}
@return false;
}
@function background-add-prefix($backgrounds, $vendor: false) {
$backgrounds-prefixed: ();
@for $i from 1 through length($backgrounds) {
$shorthand: nth($backgrounds, $i); // Get member for current index
$type: type-of($shorthand); // Get type of variable - List or String
// If shorthand is a list
@if $type == list {
$first-member: nth($shorthand, 1); // Get first member of shorthand
// Linear Gradient
@if index(linear radial, nth($first-member, 1)) {
$gradient-type: nth($first-member, 1); // linear || radial
// Get actual gradient (red, blue)
$gradient-args: false;
$shorthand-start: false;
// Linear gradient and positioning, repeat, etc. values
@if type-of($first-member) == list {
$gradient-args: nth($first-member, 2);
$shorthand-start: 2;
}
// Linear gradient only
@else {
$gradient-args: nth($shorthand, 2); // Get actual gradient (red, blue)
$shorthand-start: 3;
}
$gradient: render-gradients($gradient-args, $gradient-type, $vendor);
@for $j from $shorthand-start through length($shorthand) {
$gradient: join($gradient, nth($shorthand, $j), space);
}
$backgrounds-prefixed: append($backgrounds-prefixed, $gradient, comma);
}
// Image with additional properties
@else {
$backgrounds-prefixed: append($backgrounds-prefixed, $shorthand, comma);
}
}
// If shorthand is a simple string, color or image
@else if $type == string {
$backgrounds-prefixed: join($backgrounds-prefixed, $shorthand, comma);
}
}
@return $backgrounds-prefixed;
}
//Examples:
//@include background(linear-gradient(top, orange, red));
//@include background(radial-gradient(50% 50%, cover circle, orange, red));
//@include background(url("/images/a.png") no-repeat, linear-gradient(orange, red));
//@include background(url("image.png") center center, linear-gradient(orange, red), url("image.png"));