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svelte/transition.mjs

121 lines
2.6 KiB

import { cubicOut, cubicInOut } from './easing';
export function fade(node, {
delay = 0,
duration = 400
}) {
const o = +getComputedStyle(node).opacity;
return {
delay,
duration,
css: t => `opacity: ${t * o}`
};
}
export function fly(node, {
delay = 0,
duration = 400,
easing = cubicOut,
x = 0,
y = 0,
opacity = 0
}) {
const style = getComputedStyle(node);
const target_opacity = +style.opacity;
const transform = style.transform === 'none' ? '' : style.transform;
const od = target_opacity * (1 - opacity);
return {
delay,
duration,
easing,
css: (t, u) => `
transform: ${transform} translate(${(1 - t) * x}px, ${(1 - t) * y}px);
opacity: ${target_opacity - (od * u)}`
};
}
export function slide(node, {
delay = 0,
duration = 400,
easing = cubicOut
}) {
const style = getComputedStyle(node);
const opacity = +style.opacity;
const height = parseFloat(style.height);
const padding_top = parseFloat(style.paddingTop);
const padding_bottom = parseFloat(style.paddingBottom);
const margin_top = parseFloat(style.marginTop);
const margin_bottom = parseFloat(style.marginBottom);
const border_top_width = parseFloat(style.borderTopWidth);
const border_bottom_width = parseFloat(style.borderBottomWidth);
return {
delay,
duration,
easing,
css: t =>
`overflow: hidden;` +
`opacity: ${Math.min(t * 20, 1) * opacity};` +
`height: ${t * height}px;` +
`padding-top: ${t * padding_top}px;` +
`padding-bottom: ${t * padding_bottom}px;` +
`margin-top: ${t * margin_top}px;` +
`margin-bottom: ${t * margin_bottom}px;` +
`border-top-width: ${t * border_top_width}px;` +
`border-bottom-width: ${t * border_bottom_width}px;`
};
}
export function scale(node, {
delay = 0,
duration = 400,
easing = cubicOut,
start = 0,
opacity = 0
}) {
const style = getComputedStyle(node);
const target_opacity = +style.opacity;
const transform = style.transform === 'none' ? '' : style.transform;
const sd = 1 - start;
const od = target_opacity * (1 - opacity);
return {
delay,
duration,
easing,
css: (t, u) => `
transform: ${transform} scale(${1 - (sd * u)});
opacity: ${target_opacity - (od * u)}
`
};
}
export function draw(node, {
delay = 0,
speed,
duration,
easing = cubicInOut
}) {
const len = node.getTotalLength();
if (duration === undefined) {
if (speed === undefined) {
duration = 800;
} else {
duration = len / speed;
}
} else if (typeof duration === 'function') {
duration = duration(len);
}
return {
delay,
duration,
easing,
css: (t, u) => `stroke-dasharray: ${t * len} ${u * len}`
};
}