Feb 17, 2024 · The in operator returns true if the specified property is in the specified object or its prototype chain.

Sep 25, 2023 · This chapter documents all the JavaScript language operators, expressions and keywords.

JavaScript · Spread syntax (...) · Void operator · Operator precedence

Nov 7, 2023 · The JavaScript reference serves as a repository of facts about the JavaScript language. The entire language is described here in detail.

Apr 15, 2024 · This chapter describes JavaScript's expressions and operators, including assignment, comparison, arithmetic, bitwise, logical, string, ...

Nullish coalescing assignment · Numbers and dates · Remainder assignment (%=)

Apr 29, 2024 · The addition assignment (+=) operator performs addition (which is either numeric addition or string concatenation) on the two operands and ...

Mar 30, 2024 · The this keyword refers to the context where a piece of code, such as a function's body, is supposed to run. Most typically, it is used in ...

Sep 25, 2023 · The logical OR (||) (logical disjunction) operator for a set of operands is true if and only if one or more of its operands is true.

Nov 24, 2023 · Operator precedence determines how operators are parsed concerning each other. Operators with higher precedence become the operands of ...

Mar 5, 2024 · JavaScript (JS) is a lightweight interpreted (or just-in-time compiled) programming language with first-class functions.

Sep 6, 2023 · The new operator lets developers create an instance of a user-defined object type or of one of the built-in object types that has a ...