我是JS的新手,对旧版本不是很熟悉,我需要将此测试转换为Es6。有谁能帮助我了解我该怎么做?
'use strict';
function Shape(id, x, y) {
this.id = id;
this.setLocation(x, y);
}
Shape.prototype.setLocation = function(x, y) {
this.x = x;
this.y = y;
};
Shape.prototype.getLocation = function() {
return {
x: this.x,
y: this.y
};
};
Shape.prototype.toString = function() {
return 'Shape(' + this.id + ')';
};
function Circle(id, x, y, radius) {
Shape.call(this, id, x, y);
this.radius = radius;
}
Circle.prototype = Object.create(Shape.prototype);
Circle.prototype.constructor = Circle;
Circle.prototype.toString = function() {
return 'Circle > ' + Shape.prototype.toString.call(this);
};
答案 0 :(得分:0)
已转换为classes:
class Shape {
constructor(id, x, y) {
this.id = id;
this.setLocation(x, y);
}
setLocation(x, y) {
this.x = x;
this.y = y;
}
getLocation = () => ({
x: this.x,
y: this.y
})
toString() {
return `Shape(${this.id})`;
}
}
class Circle extends Shape {
constructor(id, x, y, radius) {
super(id, x, y)
this.radius = radius;
}
toString() {
return `Circle> ${super.toString()}`;
}
}
let shape = new Shape('shape', 5, 5);
let circle = new Circle('circle', 6, 6, 6);
console.log("Shape()",
shape.getLocation(),
shape.toString()
);
console.log("Circle()",
circle.getLocation(),
circle.toString()
);
希望这会有所帮助,