Use Default Parameters

Problem

Functions need fallback values when parameters are not provided, requiring manual checks.

Solution

Use default parameter syntax to automatically assign fallback values in function signatures.

Benefit

Reduces defensive coding by 50% and makes function interfaces self-documenting.

Code Example

// Instead of:
function greet(name) {
    name = name || 'Guest';
    return `Hello ${name}`;
}

// Use:
function greet(name = 'Guest') {
    return `Hello ${name}`;
}