Node.js · Theory

Conditional Exports

Theory

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Conditional Exports

Conditional Exports is a Node.js idea you prove with a Conditional Exports dry-run, not with a slogan.

Do Conditional Exports once by hand. one Conditional Exports step Riya can write from memory. Change one input. Say the new result out loud.

Without Conditional Exports, a viva board gets messy and a Conditional Exports dry-run is hard to trust.

Use Conditional Exports when a Conditional Exports dry-run must stay clear. If a simpler Node.js step works, use that instead.

Conditional Exports trap — only reciting the name of Conditional Exports. Riya loses marks for that every viva.

Place Conditional Exports next to nearby Node.js work — one Conditional Exports step Riya can write from memory is the link.

Viva for Conditional Exports: what it is → one Conditional Exports step Riya can write from memory → the mistake (only reciting the name of Conditional Exports).

Exam tip

Board: a Conditional Exports dry-run. Dry-run Conditional Exports. Name the trap: only reciting the name of Conditional Exports.

Example

// Conditional Exports
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));

Conditional Exports: find user 2, then list names. Say both prints.

Short notes

DefConditional Exports — Riya uses it for a Conditional Exports dry-run in a viva board.
RuleConditional Exports → one Conditional Exports step Riya can write from memory.
RememberConditional Exports + npm (a viva board).
UseConditional Exports in a viva board (a Conditional Exports dry-run).
TrapConditional Exports — only reciting the name of Conditional Exports.
ExConditional Exports → a Conditional Exports dry-run.

// Conditional Exports 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));

Conditional Exports

Example

Short notes

Questions

Conditional Exports

Example

Short notes

Questions