require('load-grunt-tasks')(grunt); grunt.initConfig({ eslint: { target: ['file.js'] } }); grunt.registerTask('default', ['eslint']); const noAlertRule = require('./conf/rules/no-alert'); grunt.initConfig({ eslint: { options: { overrideConfigFile: 'conf/eslint.js', plugins: { noAlertRule } }, target: ['file.js'] } });