static js
// the static method is a method which cannot be called through a class instance.
class Point {
constructor(x, y) {
this.x = x;
this.y = y;
}
static distance(a, b) {
const dx = a.x - b.x;
const dy = a.y - b.y;
return Math.hypot(dx, dy);
}
}
const p1 = new Point(7, 2);
const p2 = new Point(3, 8);
console.log(Point.distance(p1, p2));js static methods
class Foo(){ static methodName(){ console.log("bar") }}js class static
class myClass{
constructor(){
this.myLocaleVariable=1;//this.varname in the constructer function makes a locale var
}
localfunction(){
return "im local unique to this variable";
}
static publicfunction(){
return "i can be called without an obj"
}
}
myClass.myPublicVariable = 0;
myClass.localfunction();//error
myClass.publicfunction();//"i can be called without an obj"
myClass.myLocaleVariable;//error
myClass.myPublicVariable;//0
var obj = new myClass;
obj.localfunction();//"im local unique to this variable"
obj.publicfunction();//error
obj.myLocaleVariable;//1
obj.myPublicVariable;//errorjs class static
class ClassWithStaticMethod {
static staticMethod() {
return 'static method has been called.';
}
}
console.log(ClassWithStaticMethod.staticMethod());
// expected output: "static method has been called."Copyright © 2021 Codeinu
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