What is the assert in the mongodb4.0.3 official connection example?

I"m not sure what assert is. Which god will answer it?

here is an example of a connection to an official document 

const MongoClient = require("mongodb").MongoClient;
const assert = require("assert");

// Connection URL
const url = "mongodb://localhost:27017";

// Database Name
const dbName = "myproject";

// Create a new MongoClient
const client = new MongoClient(url);

// Use connect method to connect to the Server
client.connect(function(err) {
  assert.equal(null, err);
  console.log("Connected successfully to server");

  const db = client.db(dbName);

  client.close();
});
Mongodb
Sep.16,2021

assertion library, assert.equal (null, err) means that when err sometimes, it will directly throw the wrong

this is the knowledge of NodeJS. Reference documentation: https://nodejs.org/api/assert.

Previous: How Linux accesses locally specified disk files.

Next: How does svg's use tag refer to Ali's svg graphics?

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
© 2021 CodesHelper
Advertising Contact us About us
Menu