Node.js · Theory

What is Node-Canvas

Theory

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What is Node-Canvas

Node-Canvas (what is) is a Node.js topic. In plain words you use it for a hello server in localhost:3000. Don’t start with a slogan — start with that picture.

Smallest example: node hello.js. Type it, run it, and say what you see. If you can do that from memory, you know Node-Canvas (what is).

From the example next to this theory — What is Node-Canvas: find user 2, then list names.

Trap — calling Node ‘a language’. Fix that before you talk about advanced Node.js.

Viva — what is Node-Canvas (what is)? Then show node hello.js. Then name the trap.

Exam tip

What is Node-Canvas (what is)? Show this: node hello.js. Trap: calling Node ‘a language’.

Example

// What is Node-Canvas
const users = [
  { id: 1, name: "Asha" },
  { id: 2, name: "Ravi" },
];

function findUser(id) {
  return users.find((u) => u.id === id) ?? null;
}

console.log(findUser(2));
console.log(users.map((u) => u.name));

What is Node-Canvas: find user 2, then list names. Say both prints.

Short notes

DefNode-Canvas (what is) — a hello server in localhost:3000.
Rulenode hello.js
Trapcalling Node ‘a language’
Uselocalhost:3000

// What is Node-Canvas const users = [ { id: 1, name: "Asha" }, { id: 2, name: "Ravi" }, ]; function findUser(id) { return users.find((u) => u.id === id) ?? null; } console.log(findUser(2)); console.log(users.map((u) => u.name));

What is Node-Canvas

Example

Short notes

Questions

What is Node-Canvas

Example

Short notes

Questions