@antv/g2/esm/animation/fadeIn.js

the Grammar of Graphics in Javascript

/**
 * Transform mark from transparent to solid.
 */
export const FadeIn = (options) => {
    return (from, _, defaults) => {
        const [shape] = from;
        const { fillOpacity = 1, strokeOpacity = 1, opacity = 1 } = shape.style;
        const keyframes = [
            { fillOpacity: 0, strokeOpacity: 0, opacity: 0 },
            {
                fillOpacity,
                strokeOpacity,
                opacity,
            },
        ];
        return shape.animate(keyframes, Object.assign(Object.assign({}, defaults), options));
    };
};
FadeIn.props = {};
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