I want to create simple plugin with ES6 using classes . but without using new keyword . it possible to return new instance from class automatically .
example :
class Rectangle{
constructor(x, y){
this.x = x,
this.y = y
}
eq(){
console.log('Result ' + this.x * this.y )
}
}
const myRect = new Rectangle(10, 10);
myRect.eq();
I want to use like this
Rectangle.eq(10, 10);
Define eq() as a static method. Then you don't have to instantiate your class, but can use it directly.
this refers to the instance of the class. When you're using a static method, you don't have an instance.
this refers to depends on how a function is called. If a static method is called as Foo.bar(), then this inside bar will refer to Foo, i.e. the class/constructor function itself.You can use module design pattern.
var Rectangle = (function() {
return {
eq: function(x, y) {
console.log(x * y);
}
};
})();
Rectangle.eq(2,5);
Check here for reference : https://scotch.io/bar-talk/4-javascript-design-patterns-you-should-know
Reflect.construct does the same thing:
class Rectangle{
constructor(x, y){
this.x = x,
this.y = y
}
eq(){
console.log('Result ' + this.x * this.y )
}
}
Reflect.construct(Rectangle, [10, 10]).eq();
static eq(x, y) { return new this(x, y).eq(); }to achieve what you want, but unless there is more to it than you are showing, a class is unnecessary.