How to use the caniuse-lite.agents function in caniuse-lite

const Declaration = require('../lib/declaration');
const Prefixes    = require('../lib/prefixes');
const Browsers    = require('../lib/browsers');
const Supports    = require('../lib/supports');
const Selector    = require('../lib/selector');
const OldValue    = require('../lib/old-value');
const Value       = require('../lib/value');
const parse       = require('postcss/lib/parse');

const data = {
    browsers: require('caniuse-lite').agents,
    prefixes: {
        a: {
            browsers: ['firefox 21', 'firefox 20 old', 'chrome 30', 'ie 6']
        },
        b: {
            browsers: ['ie 7 new', 'firefox 20'],
            mistakes: ['-webkit-'],
            props:    ['a', '*']
        },
        c: {
            browsers: ['ie 7', 'firefox 20'],
            selector: true
        }
    }
};

* You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

"use strict";

var browserslist = require('browserslist');

var agents = require('caniuse-lite').agents;

var utils = require('./utils');

var Browsers =
/*#__PURE__*/
function () {
  /**
     * Return all prefixes for default browser data
     */
  Browsers.prefixes = function prefixes() {
    if (this.prefixesCache) {
      return this.prefixesCache;
    }

    this.prefixesCache = [];

Browsers.prefixes = function prefixes() {
        if (this.prefixesCache) {
            return this.prefixesCache;
        }

        var data = require('caniuse-lite').agents;

        this.prefixesCache = [];
        for (var name in data) {
            this.prefixesCache.push('-' + data[name].prefix + '-');
        }

        this.prefixesCache = utils.uniq(this.prefixesCache).sort(function (a, b) {
            return b.length - a.length;
        });

        return this.prefixesCache;
    };

plugin.info = function (opts) {
        opts = opts || {};
        opts.from = opts.from || process.cwd();

        return require('./info')(loadPrefixes(opts));
    };

    return plugin;
});

/**
 * Autoprefixer data
 */
module.exports.data = {
    browsers: require('caniuse-lite').agents,
    prefixes: require('../data/prefixes')
};

/**
 * Autoprefixer default browsers
 */
module.exports.defaults = browserslist.defaults;

/**
 * Inspect with default Autoprefixer
 */
module.exports.info = function () {
    return module.exports().info();
};

"use strict";

var browserslist = require('browserslist');

var agents = require('caniuse-lite').agents;

var utils = require('./utils');

var Browsers =
/*#__PURE__*/
function () {
  /**
     * Return all prefixes for default browser data
     */
  Browsers.prefixes = function prefixes() {
    if (this.prefixesCache) {
      return this.prefixesCache;
    }

    this.prefixesCache = [];

let agents = require('caniuse-lite').agents

module.exports = {
  formatBrowserName: function (browserKey, versions) {
    let browserName = (agents[browserKey] || {}).browser
    if (!versions) { return browserName }
    return (browserName + ' (' + versions.join(',') + ')')
  }
}

Browsers.prefixes = function prefixes() {
        if (this.prefixesCache) {
            return this.prefixesCache;
        }

        var data = require('caniuse-lite').agents;

        this.prefixesCache = [];
        for (var name in data) {
            this.prefixesCache.push('-' + data[name].prefix + '-');
        }

        this.prefixesCache = utils.uniq(this.prefixesCache).sort(function (a, b) {
            return b.length - a.length;
        });

        return this.prefixesCache;
    };

};

    plugin.options = options;

    plugin.info = function (opts) {
        return require('./info')(loadPrefixes(opts));
    };

    return plugin;
});

/**
 * Autoprefixer data
 */
module.exports.data = {
    browsers: require('caniuse-lite').agents,
    prefixes: require('../data/prefixes')
};

/**
 * Autoprefixer default browsers
 */
module.exports.defaults = browserslist.defaults;

/**
 * Inspect with default Autoprefixer
 */
module.exports.info = function () {
    return module.exports().info();
};

plugin.info = function (opts) {
        opts = opts || {};
        opts.from = opts.from || process.cwd();

        return require('./info')(loadPrefixes(opts));
    };

    return plugin;
});

/**
 * Autoprefixer data
 */
module.exports.data = {
    browsers: require('caniuse-lite').agents,
    prefixes: require('../data/prefixes')
};

/**
 * Autoprefixer default browsers
 */
module.exports.defaults = browserslist.defaults;

/**
 * Inspect with default Autoprefixer
 */
module.exports.info = function () {
    return module.exports().info();
};

Browsers.prefixes = function prefixes() {
        if (this.prefixesCache) {
            return this.prefixesCache;
        }

        var data = require('caniuse-lite').agents;

        this.prefixesCache = [];
        for (var name in data) {
            this.prefixesCache.push('-' + data[name].prefix + '-');
        }

        this.prefixesCache = utils.uniq(this.prefixesCache).sort(function (a, b) {
            return b.length - a.length;
        });

        return this.prefixesCache;
    };