motion/dist/targets/dom/utils/feature-detection.es.js

The Motion library for the web

const testAnimation = (keyframes) => document.createElement("div").animate(keyframes, { duration: 0.001 });
const featureTests = {
    cssRegisterProperty: () => typeof CSS !== "undefined" &&
        Object.hasOwnProperty.call(CSS, "registerProperty"),
    waapi: () => Object.hasOwnProperty.call(Element.prototype, "animate"),
    partialKeyframes: () => {
        try {
            testAnimation({ opacity: [1] });
        }
        catch (e) {
            return false;
        }
        return true;
    },
    finished: () => Boolean(testAnimation({ opacity: [0, 1] }).finished),
};
const results = {};
const supports = Object.keys(featureTests).reduce((acc, key) => {
    acc[key] = () => {
        if (results[key] === undefined)
            results[key] = featureTests[key]();
        return results[key];
    };
    return acc;
}, {});

export { supports };