Web Reference: Feb 21, 2026 · In the same way, JavaScript objects can have properties, which define their characteristics. In addition to objects that are predefined in the browser, you can define your own objects. This chapter describes how to use objects, properties, and methods, and how to create your own objects. You can access object properties in these ways: In general, dot notation is preferred for readability and simplicity. Bracket notation is necessary in some cases: Bracket notation is useful when the property name is stored in a variable: You can change the value of a property: You can add a new property by simply giving it a value: Jan 16, 2026 · Object properties allow developers to easily organize, access, and modify related data. Each property consists of a key (name) and a value, which can be any data type.
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