@material-vega/core/lib/theme/createTheme.js

Material Design stylized themes for Vega Lite visualizations

import { extendDefaults } from '../options';
import { themes } from './themes';
import { mergeConfig } from 'vega';
/**
 * Create a Material Vega chart theme
 * The result is a Vega/Vega Lite Config object to be passed to vegaEmbed or included in a spec
 */
export function createTheme(options, theme) {
    var opts = extendDefaults(options);
    var configGenerators = themes[theme];
    var configs = configGenerators.map(function (createConfig) { return createConfig(opts); });
    return mergeConfig.apply(void 0, configs);
}