Ternary & Special Operators in JavaScript
From the JavaScript cheat sheet · Operators · verified Jul 2026
Ternary & Special Operators
Conditional and other special operators
javascript
// Ternary operator
const result = condition ? 'yes' : 'no';
// Optional chaining
const value = obj?.property?.nested;
const result = func?.();
// Nullish coalescing
const value = input ?? 'default';
// Spread operator
const arr = [...array1, ...array2];
const obj = {...obj1, ...obj2};
// Comma operator
let x = (5, 10); // x = 10
// void operator
void functionCall(); // returns undefined💡 Ternary operator is great for simple conditions, avoid nesting
⚡ Optional chaining prevents "Cannot read property of undefined" errors
📌 Spread creates shallow copies, not deep copies
🔥 Comma operator evaluates all expressions, returns the last one
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