Category: JavaScript

To destroy cookie with Node.js, we call clearCookie.

For instance, we write

res.clearCookie("key");

to call clearCookie to clear the cookie with key 'key'.

To combine or merge JSON on Node.js, we use the spread operator.

For instance, we write

const o1 = { a: 1 };
const o2 = { b: 2 };
const obj = { ...o1, ...o2 };

to create the obj object by spreading the properties of o1 and o2 into a new object.

To export an async function in Node.js, we set the module.exports property.

For instance, we write

const doStuff = async () => {
  // ...
};

module.exports.doStuff = doStuff;

to define the doStuff function and set that as the value of the module.exports.doStuff to export it.

To create a basic static file server in Node.js, we use Express.

For instance, we write

const express = require("express");
const app = express();
const port = process.env.PORT || 4000;

app.use(express.static(__dirname + "/public"));
app.listen(port);

to create a file server by calling express.static to expose the /public folder as a static folder.

We call app.listen to start a web server.

To use an include with attributes with Node Sequelize, we set the attribute property.

For instance, we write

Payment.findAll({
  where: {
    DairyId: req.query.dairyid,
  },
  attributes: {
    exclude: ["createdAt", "updatedAt"],
  },
  include: {
    model: Customer,
    attributes: ["customerName", "phoneNumber"],
  },
});

to call findAll to add the attributes property to exclude.

And we add include with the columns of Customer to include.