GoF Template

Template.js

const datastore = {
    process: function () {
        this.connect();
        this.select();
        this.disconnect();
        return true;
    }
};

function inherit(proto) {
    const F = function () { };
    F.prototype = proto;
    return new F();
}

const postgres = inherit(datastore);

// implement template steps

postgres.connect = function () {
    console.log("Postgres: connect step");
};

postgres.select = function () {
    console.log("Postgres: select step");
};

postgres.disconnect = function () {
    console.log("Postgres: disconnect step");
};

postgres.process();

// Postgres: connect step
// Postgres: select step
// Postgres: disconnect step