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) => {
const circle = require('./circle.js'); // require('circle.js')とか、require('circle')とか、require('/circle')の記述はだめだった。
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;
};

別function呼び出し

function sum(){
    return 1 + 2;
}
exports.sum = functions.region('asia-northeast1').https.onRequest((request, response) => {
response.send('sum '
           + sum());
});

function分割

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