Part 23 | JavaScript Tutorial | Creating objects in JS | Function Constructor | Object Create metho
Content:-
An object can be created mainly in 4 ways:
1. Literal way
- Using {} we can create an object.
eg: let a = {name: "Trinits"};
2. Using new keywords.
const person = new Object();
person.name = "Trinits";
Note:- For readability, simplicity, and execution speed, use the object literal method.
3. Using Function constructor:-
- creating an object using a constructor function. The new keyword is used to create a new instance of the object.
- good practice to name constructor functions with an upper-case first letter.
- Note:- Using the arrow functions, we can't create the Function constructor.
function Person(name, age) {
this.name = name;
this.age = age;
this.getName = function() {
return "MR/MS" + this.name;
};
}
const p1 = new Person("Trinits", 20);
const p1 = new Person("Technologies", 25);
- We can add a method to the existing object as given below
p1.getName = function () {
return "MR/MS" + this.name;
};
- We can add the additional properties as given below
p1.salary = 50000;
4. Object.create()
- Create an object with an existing object as a prototype
let a = Object.create(null)
a.name ="Trinits";
//Creating object based on another one.
const myPrototype = {
prop1: value1,
prop2: value2,
};
const myObject = Object.create(myPrototype);
5. ES6 Class syntax: This involves defining a class with a constructor and any other methods on the class.
class Person {
constructor(prop1, prop2) {
this.prop1 = prop1;
this.prop2 = prop2;
}
myMethod() {
// method code here
}
}
const myObject = new Person(value1, value2);
Видео Part 23 | JavaScript Tutorial | Creating objects in JS | Function Constructor | Object Create metho автора Доход с Программирования на JS
Видео Part 23 | JavaScript Tutorial | Creating objects in JS | Function Constructor | Object Create metho автора Доход с Программирования на JS
Информация
29 ноября 2023 г. 11:28:23
00:14:46
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