@use 'sass:map';
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// === 变量区域 ===
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$transition: (
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// 动画持续时间
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duration: 0.25s,
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// 滑动动画的移动距离
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distance: 15px,
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// 默认缓动函数
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easing: cubic-bezier(0.25, 0.1, 0.25, 1),
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// 淡入淡出专用的缓动函数
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fade-easing: cubic-bezier(0.4, 0, 0.6, 1)
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);
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// 抽取配置值函数，提高可复用性
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@function transition-config($key) {
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@return map.get($transition, $key);
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}
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// 变量简写
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$duration: transition-config('duration');
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$distance: transition-config('distance');
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$easing: transition-config('easing');
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$fade-easing: transition-config('fade-easing');
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// === 动画类 ===
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// 淡入淡出动画
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.fade {
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&-enter-active,
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&-leave-active {
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transition: opacity $duration $fade-easing;
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will-change: opacity;
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}
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&-enter-from,
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&-leave-to {
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opacity: 0;
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}
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&-enter-to,
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&-leave-from {
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opacity: 1;
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}
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}
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// 滑动动画通用样式
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@mixin slide-transition($direction) {
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$distance-x: 0;
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$distance-y: 0;
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@if $direction == 'left' {
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$distance-x: -$distance;
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} @else if $direction == 'right' {
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$distance-x: $distance;
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} @else if $direction == 'top' {
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$distance-y: -$distance;
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} @else if $direction == 'bottom' {
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$distance-y: $distance;
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}
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&-enter-active {
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transition:
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opacity $duration $easing,
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transform $duration $easing;
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will-change: opacity, transform;
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}
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&-leave-active {
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transition:
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opacity calc($duration * 0.7) $easing,
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transform calc($duration * 0.7) $easing;
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will-change: opacity, transform;
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}
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&-enter-from {
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opacity: 0;
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transform: translate3d($distance-x, $distance-y, 0);
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}
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&-enter-to {
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opacity: 1;
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transform: translate3d(0, 0, 0);
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}
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&-leave-to {
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opacity: 0;
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transform: translate3d(-$distance-x, -$distance-y, 0);
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}
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}
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// 滑动动画方向类
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.slide-left {
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@include slide-transition('left');
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}
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.slide-right {
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@include slide-transition('right');
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}
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.slide-top {
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@include slide-transition('top');
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}
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.slide-bottom {
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@include slide-transition('bottom');
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}
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