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In this article Xiaobian for you to introduce in detail "JavaScript object definition and case analysis", the content is detailed, the steps are clear, the details are handled properly, I hope this "JavaScript object definition and case analysis" article can help you solve your doubts, following the editor's ideas slowly in-depth, together to learn new knowledge.

Object definition

You can use characters to define and create JavaScript objects:

Example

Varperson= {firstName: "John", lastName: "Doe", age:50,eyeColor: "blue"}

Defining a JavaScript object can span multiple lines, and spaces and line wrapping are not required:

Example

Varperson= {

FirstName: "John"

LastName: "Doe"

Age:50

EyeColor: "blue"

}

Object attribute

It can be said that the JavaScript object is a container for variables.

However, we generally think that "JavaScript objects are containers for key-value pairs."

Key-value pairs are usually written as name:value (keys and values are separated by colons).

Key-value pairs are often referred to as object properties in JavaScript objects.

The JavaScript object is a container for property variables.

Object key-value pairs are written similar to:

Associative arrays in PHP

Dictionaries in Python

Hash Table in C language

Hash Mapping in Java

Hash tables in Ruby and Perl

Access object properties

You can access object properties in two ways:

Example 1

Person.lastName

Example 2

Person ["lastName"]

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