February 3, 2021 - By Nishant Kumar The conditional or question mark operator, represented by a ?, is one of the most powerful features in JavaScript. The ? operator is used in conditional statements, and when paired with a :, can function as a compact alternative ...

The conditional (ternary) operator is the only JavaScript operator that takes three operands: a condition followed by a question mark (?), then an expression to execute if the condition is truthy followed by a colon (:), and finally the expression to execute if the condition is falsy.

The optional chaining (?.) operator accesses an object's property or calls a function. If the object accessed or function called using this operator is undefined or null, the expression short circuits and evaluates to undefined instead of throwing an error.

September 24, 2023 - The double question marks operator offers a reliable, concise way to set default values and avoid errors in your code. Remember, it’s all about preventing those pesky null or undefined values from causing havoc in your JavaScript programs.

The ?? operator in JavaScript is known as the nullish coalescing operator. It returns the right-hand operand when the left-hand operand is either null or undefined. This operator provides a reliable way to specify default values.

March 12, 2024 - As of its introduction in ECMAScript 2020, the ?? operator is supported in most modern browsers and JavaScript environments, including Node.js versions that are based on newer V8 engines. However, for older environments or browsers that do not support ECMAScript 2020 features, a transpiler like Babel may be required to ensure compatibility. The double question mark operator enriches JavaScript’s syntax by offering a clear and concise way to handle null and undefined values.

July 4, 2023 - The Ternary Operator, represented by the question mark (?), is a concise way to write conditional statements in JavaScript.

In this example, we determine whether a person is an adult based on their age using the ? operator. If the age is greater than 18, isAdult will be assigned the value Yes; otherwise, it will be assigned No. The question mark operator can also be used inside a function call to make decisions based on the parameters passed in the function.

February 15, 2023 - If it is, we return the string ‘Cheers 🍻’. If not, we return the string ‘Sorry, no drinks for you 🚫’. The question mark symbol is also used in the nullish coalescing operator.

The question mark in JavaScript is commonly used as conditional operator -- called ternary operator when used with a colon (:) and a question mark (?) -- to assign a variable name conditionally.

To do that, we can use the if statement and the conditional operator ?, that’s also called a “question mark” operator.

July 15, 2025 - The question mark operator, represented by a ?, is a powerful feature in JavaScript that is used in conditional statements, and when paired with a :, can function as a compact alternative to if...else statements. There are three main uses for the ?

Simply put, the double question mark (??) operator returns the right-hand operand if the left-hand operand evaluates to a nullish value (either null or undefined).

November 21, 2022 - The Nullish coalescing operator ... question mark is a logical operator that takes two values and returns the right-hand value if the left-hand value is undefined or null, Else returns the left-hand operand....

May 16, 2023 - What Does the ?. Question Mark Dot Mean in JavaScript or TypeScript? Unraveling the mystery of the ?. optional chaining operator with practical examples Introduction: Optional Chaining in JS / TS …

September 14, 2023 - The first and perhaps the most common use of the question mark in JavaScript is as a conditional operator, otherwise known as the ternary operator. The word "ternary" comes from Latin and it means "composed of three parts".

The nullish coalescing (??) operator is a logical operator that returns its right-hand side operand when its left-hand side operand is null or undefined, and otherwise returns its left-hand side operand.

July 10, 2022 - The two question mark symbol (??) forms the null coalescing operator. The operator takes two operands on either side. The expression returns the right-hand side operand if the left-hand side operator is null or undefined.