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In this article, the editor introduces in detail "what the attributes of objects in javascript refer to", with detailed content, clear steps and proper handling of details. I hope that this article "what the attributes of objects in javascript refer to" can help you solve your doubts.

In JavaScript, the properties of an object refer to the values associated with the object, and the object is a collection of unordered attributes, which can usually be modified, added, and deleted, and the syntax for accessing object properties is "objectName.property" or "objectName [" property "].

The operating environment of this tutorial: windows10 system, javascript1.8.5 version, Dell G3 computer.

What are the properties of an object in javascript

Properties are the most important part of any JavaScript object.

Property refers to the value associated with the JavaScript object.

A JavaScript object is a collection of unordered attributes.

Properties can usually be modified, added, and deleted, but some properties are read-only.

Access the JavaScript property

The syntax for accessing object properties is:

ObjectName.property / / person.age

Or:

ObjectName ["property"] / / person ["age"]

Or:

ObjectName [expression] / / x = "age"; person [x]

The expression must evaluate to the property name.

Examples are as follows:

JavaScript object Properties

There are two different ways to access object properties:

You can use .property or ["property"].

Var person = {firstname: "Bill", lastname: "Gates", age:62, eyecolor: "blue"}; document.getElementById ("demo") [xss_clean] = person.firstname + "is" + person.age + "years old."

Output result:

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