JavaScript Objects are basically a collection of properties. Each property is a key-value pair. For example- FirstName is a key and Sita is a value.
Javascript Objects – How to Create an Object in Javascript?
SYNTAX - const objectName{
Key: value;
}
Example- The following example creates a new object named foodItem with one property called breadPrice
const foodItem{
breadPrice: 100;
}We can access each property of the object by two different ways.
objectName.propertyName
eg – foodItem.breadPrice
objectName["propertyName"]
eg – foodItem[“breadPrice]NOTE – Every key is converted to string except for symbols.
We can also modify objects in the following way:
foodItem.breadPrice = 98;
We can also add a new property to the object foodItem
foodItem.CarrotPrice=102;
METHODS IN OBJECTS
Methods are actions that are to be performed on an object. They are stored in properties as function definitions.
For example – in object foodItem adding a method called totPrice to calculate the total price of the food items as,
totPrice: function(){
this.breadPrice+this.CarrotPrice
}where this refers to foodItem object.
We can access the object methods by objectName.methodName()