@gravity-ui/uikit/build/esm/components/utils/mergeProps.js

Gravity UI base styling and components

export function mergeProps(...propsList) {
    const eventMap = new Map();
    return propsList.reduce((acc, props) => {
        Object.entries(props).forEach(([key, value]) => {
            if (key.startsWith('on') &&
                key.charCodeAt(2) >= /* A */ 65 &&
                key.charCodeAt(2) <= /* Z */ 90) {
                if (!eventMap.has(key)) {
                    eventMap.set(key, []);
                }
                if (typeof value === 'function') {
                    eventMap.get(key)?.push(value);
                    acc[key] = (...args) => {
                        return eventMap
                            .get(key)
                            ?.map((fn) => fn(...args))
                            .find((v) => v !== undefined);
                    };
                }
            }
            else {
                acc[key] = value;
            }
        });
        return acc;
    }, {});
}
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