What is obj in js

JavaScript variables are containers of data values.

This code assigns a single value (porsche) to a variable named car:

var car = "porsche";

Objects are also variables. But objects contain many values.

This code assigns multiple values ​​​​(porsche, 911, white) to a variable named car:

var car = {type:" porsche", model:"911", color:"white"};

Values ​​are written in name:value pairs (name and value are separated by colon).

JavaScript objects are containers of named values

obj To put it bluntly, it is document.getElementById(whichlink "menu")

This is equivalent to assigning the value of document.getElementById(whichlink "menu") to a variable in obj

Accessing object properties

You can access in two ways Attribute:

objectName.propertyName

or

objectName["propertyName"]

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