config.extraPlugins =...

config.extraPlugins = 'wordcount,notification';
config.wordcount = {

    // Whether or not you want to show the Word Count
    showWordCount: false,

    // Whether or not you want to show the Char Count
    showCharCount: true,
    
    // Maximum allowed Word Count
    maxWordCount: 4,

    // Maximum allowed Char Count
    maxCharCount: 10
};