noop#

A no-operation function that does nothing and returns undefined. Useful as a default or placeholder function.

Usage Scenarios#

• Default Callbacks: As a safe default for optional callback functions
• Placeholder: Temporary placeholder during development
• Testing: Mock function for testing scenarios

Examples#

import { noop } from 'funtool';

// As default callback
function fetchData(callback = noop) {
  // ...
  callback(); // Safe to call even if no callback provided
}

// As placeholder
const tempHandler = noop;
// Later replaced with actual implementation
tempHandler = realHandler;

Signature#

function noop(): void

Return Value#

Always returns undefined.

Notes#

• Extremely lightweight function
• Useful for avoiding null checks on optional callbacks
• Can be used as a default parameter value