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Web Modules

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Web Modules

Web Modules sits in a new folder. Arun’s job is install express. Write that first.

Keep Web Modules small. Arun should finish install express in a few lines, not a 40-line dump.

Without Web Modules, a new folder gets messy and install express is hard to trust.

Arun ships Web Modules in a new folder. That is the use case worth saying.

If install express breaks under Web Modules, check deleting package-lock blindly first.

After Web Modules, Arun should still remember deleting package-lock blindly.

Close Web Modules with — “If I skip it, install express goes wrong like this: deleting package-lock blindly.”

Exam tip

Board: install express. Dry-run Web Modules. Name the trap: deleting package-lock blindly.

Example

// Web Modules
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));

Web Modules: find user 2, then list names. Say both prints.

Short notes

DefWeb Modules — Arun uses it for install express in a new folder.
RuleWeb Modules → npm init + npm i express.
RememberWeb Modules + an Express route (a new folder).
UseWeb Modules in a new folder (install express).
TrapWeb Modules — deleting package-lock blindly.
ExWeb Modules → install express.

// Web Modules 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));

Web Modules

Example

Short notes

Questions

Web Modules

Example

Short notes

Questions