capybara/frontend/logger.js

const loggerOfType = (components, type='log') => (...args) => {
    let str = '%c';
    const style = 'color: #5e81ac; font-weight: bold;';
    for (const i in components) {
        const v = components[i];
        if (components[i+1] === undefined) {
            str += `[${v}]`;
        } else {
            str += `[${v}] `;
        }
    }
    switch (type) {
        case 'log': {
            console.log(str, style, ...args);
            break;
        }

        case 'error': {
            console.error(str, style, ...args);
            break;
        }
            
        case 'warn': {
            console.warn(str, style, ...args);
            break;
        }

        case 'genmsg': {
            return str;
        }

        default: {
            return str;
        }
    }
};

function logger(components, types=['warn', 'error', 'log']) {
    const loggerObj = {};

    for (const type of types) {
        loggerObj[type] = loggerOfType(components, type);
    }

    return loggerObj;
}


export function domLog(message) {
    document.body.appendChild(document.createTextNode(message));
}

export default logger;