Gcp/Firebase/CloudFunctions/カスタムクラス

別クラス呼び出し

functions/index.js

exports.circle = functions.region('asia-northeast1').https.onRequest((request, response) => {
var circle = require('./circle.js');
response.send('The area of a circle of radius 4 is '
           + circle.area(4));
});

functions/circle.js

var PI = Math.PI;
exports.area = function (r) {
  return PI * r * r;
};
exports.cube = function (r) {
  return PI * r * r * r;
};

function分割

https://uyamazak.hatenablog.com/entry/2018/10/22/113000