All properties have a name. In addition they also have a value. The value is one of the property's attributes. Other attributes are: enumerable, configurable, and writable. These attributes define how the property can be accessed (is it readable?, is it writable?)

Mar 6, 2025 · A JavaScript property is a member of an object that associates a key with a value. A JavaScript object is a data structure that stores a collection of properties.

Nov 20, 2024 · JavaScript objects are collections of properties, where each property is defined as a key-value pair. Understanding object properties is important to working with JavaScript as they enable dynamic storage, access, and manipulation of data.

Apr 3, 2025 · JavaScript is designed on an object-based paradigm. An object is a collection of properties, and a property is an association between a name (or key) and a value. A property's value can be a function, in which case the property is known as a method.

Jun 19, 2022 · A property is a “key: value” pair, where key is a string (also called a “property name”), and value can be anything. We can imagine an object as a cabinet with signed files. Every piece of data is stored in its file by the key. It’s easy to find a …

JavaScript objects have two types of properties: data properties and accessor properties. JavaScript uses internal attributes denoted [[...]] to describe the characteristics of properties such as [[Configurable]], [[Enumerable]], [[Writable]], and [[Value]], [[Get]], and [[Set]].

Oct 18, 2022 · Object properties, besides a value, have three special attributes (so-called “flags”): writable – if true, the value can be changed, otherwise it’s read-only. enumerable – if true, then listed in loops, otherwise not listed. configurable – if true, the property can be deleted and these attributes can be modified, otherwise not.

The reference below shows the Properties and Methods used in JavaScript and in the Browser object model. Deprecated in version 1.5. Compiles a regular expression. Encodes a string. Deprecated in version 1.5. Use encodeURI () or encodeURIComponent () instead. Tests for a match in a string. Returns the first match. Deprecated.

In this article, I want to dig much deeper into the concept of object properties and how they can be used. Properties are like variables: They are declared with a name, and used to contain a piece of data. But while variables usually exist in the global space, a property is declared on an object.

May 7, 2019 · A property is the association between an object key and its value, similar to how a variable is the association between a name and a value. So if you have an object like let x = {foo: 123} , then “the x.foo property” is referring to the pair of the key “foo” and its value 123.