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Revamp accordion borders to fix pixel jumping #33149

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merged 3 commits into from
Mar 17, 2021
Merged

Revamp accordion borders to fix pixel jumping #33149

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bdb455f
Revamp accordion borders to fix pixel jumping when toggling
mdo Mar 2, 2021
4fb3d1a
Use variable
mdo Mar 17, 2021
e2d3d90
make linter happy, multiple by -1
mdo Mar 17, 2021
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51 changes: 19 additions & 32 deletions scss/_accordion.scss
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Original file line number Diff line number Diff line change
Expand Up @@ -12,18 +12,15 @@
color: $accordion-button-color;
text-align: left; // Reset button style
background-color: $accordion-button-bg;
border: $accordion-border-width solid $accordion-border-color;
border: 0;
@include border-radius(0);
overflow-anchor: none;
@include transition($accordion-transition);

&.collapsed {
border-bottom-width: 0;
}

&:not(.collapsed) {
color: $accordion-button-active-color;
background-color: $accordion-button-active-bg;
box-shadow: inset 0 ($accordion-border-width * -1) 0 $accordion-border-color;

&::after {
background-image: escape-svg($accordion-button-active-icon);
Expand Down Expand Up @@ -61,33 +58,35 @@
}

.accordion-item {
margin-bottom: -$accordion-border-width;
background-color: $accordion-bg;
border: $accordion-border-width solid $accordion-border-color;

&:first-of-type {
@include border-top-radius($accordion-border-radius);

.accordion-button {
@include border-top-radius($accordion-border-radius);
@include border-top-radius($accordion-inner-border-radius);
}
}

// Only set a border-radius on the last item if the accordion is collapsed
&:last-of-type {
margin-bottom: 0;
@include border-bottom-radius($accordion-border-radius);

.accordion-button {
// Only set a border-radius on the last item if the accordion is collapsed
&.collapsed {
border-bottom-width: $accordion-border-width;
@include border-bottom-radius($accordion-border-radius);
@include border-bottom-radius($accordion-inner-border-radius);
}
}

.accordion-collapse {
border-bottom-width: $accordion-border-width;
@include border-bottom-radius($accordion-border-radius);
}
}
}

.accordion-collapse {
border: solid $accordion-border-color;
border-width: 0 $accordion-border-width;
}

.accordion-body {
padding: $accordion-body-padding-y $accordion-body-padding-x;
}
Expand All @@ -98,29 +97,17 @@
// Remove borders and border-radius to keep accordion items edge-to-edge.

.accordion-flush {
.accordion-button {
border-right: 0;
border-left: 0;
@include border-radius(0);
}

.accordion-collapse {
border-width: 0;
}

.accordion-item {
&:first-of-type {
.accordion-button {
border-top-width: 0;
@include border-top-radius(0);
}
}
@include border-radius(0);

&:last-of-type {
.accordion-button.collapsed {
border-bottom-width: 0;
@include border-bottom-radius(0);
}
.accordion-button {
border-right: 0;
border-left: 0;
@include border-radius(0);
}
}
}
3 changes: 2 additions & 1 deletion scss/_variables.scss
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Original file line number Diff line number Diff line change
Expand Up @@ -1101,10 +1101,11 @@ $card-group-margin: $grid-gutter-width / 2 !default;
$accordion-padding-y: 1rem !default;
$accordion-padding-x: 1.25rem !default;
$accordion-color: $body-color !default;
$accordion-bg: transparent !default;
$accordion-bg: $body-bg !default;
$accordion-border-width: $border-width !default;
$accordion-border-color: rgba($black, .125) !default;
$accordion-border-radius: $border-radius !default;
$accordion-inner-border-radius: subtract($accordion-border-radius, $accordion-border-width) !default;

$accordion-body-padding-y: $accordion-padding-y !default;
$accordion-body-padding-x: $accordion-padding-x !default;
Expand Down