从supertype继承行为
function Animal(name,color) {
this.name=name;
this.color=color;
}
let duck = Object.create(Animal.prototype);
let beagle = Object.create(Animal.prototype);
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确定
function Animal(name,color) {
this.name=name;
this.color=color;
}
let duck = Object.create(Animal.prototype);
let beagle = Object.create(Animal.prototype);