react-cosmos/dist/corePlugins/portRetryPlugin.js

Sandbox for developing and testing UI components in isolation

import { findNextAvailablePort } from '../shared/findNextAvailablePort.js';
export const portRetryPlugin = {
    name: 'portRetry',
    async config({ config, mode }) {
        if (mode === 'export') {
            return config;
        }
        const { port, portRetries } = config;
        return {
            ...config,
            port: portRetries ? await findNextAvailablePort(port, portRetries) : port,
        };
    },
};