OBJECT METHODS
- JavaScript Object contains a function as a value in a key/name.
- Simply, JavaScript Method is an Object property that has a function.
Syntax
const object_name = {
key_1: value_1;
key_2: value_2
key_3: function() {
// code to be execute.
}
}
Accessing Methods
We know how to access an object and how to call a function. Both will combine we can access the JavaScript method.
Syntax
objectName.key(or)method name();
NOTE :
To access the methods, we put must () end of the method name.
Example
const person = {
name: 'Manikandan',
age: 24,
sayHello: function () {
console.log('Hello Manikandan');
},
};
// ** access property
console.log(person.name); // Manikandan
// ** access property as well as function in an object.
console.log(person.sayHello); // [Function: sayHello]
// ** access method
person.sayHello(); // Hello Manikandan
'this' key word
To access a property of an object from within a method of the same object,
we use this keyword.
const person = {
name: 'Manikandan',
age: 23,
sayHello: function() {
console.log(`Hi, This is ${this.name}. I am ${this.age} yrs old`);
}
}
person.sayHello();
here,
sayHello method(person.sayHello) needs to access name property in same object(person.name).
Both of the same Object.(person) so we used this keyword here.
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