@func-js/core demo

const {give} = require('@func-js/core'); /** * Auto parameters by using before */ function genInfo(id) { return { id: id, name: 'Info #' + id } } var autoGenInfo = give(genInfo) .before(function (params) { var args = params.args; if (!args[0]) { args[0] = '88888'; } }); console.log(autoGenInfo()); // > { id: '88888', name: 'Info #88888', autoGen: true } console.log(autoGenInfo('4123')); // > { id: '4123', name: 'Info #4123' } /** * Using after to sign now timestamp for last return value */ var signTimeInfo = autoGenInfo.after( function (params) { var lastValue = params.lastValue; lastValue.singTime = Date.now(); return lastValue; } ); console.log(signTimeInfo()); // > { id: '88888', name: 'Info #88888', singTime: 1609772675561 }