循环js类的属性

Question

让我们说：

function person(){
    this.name = null;
    this.lastname = null;
    this.age = null;
    this.height = null;
}

如何迭代属性？

类似的东西：

foreach(properties as property){
     console.log ( property.nameoftheproperty, property.valueoftheproperty);
}

Answer 1

您可以使用for..in循环，就像这样

function Person(){
    this.name = null;
    this.lastname = null;
    this.age = null;
    this.height = null;
}

var person = new Person();
for (var key in person) {
    console.log(key, person[key]);
}

<强>输出

name null
lastname null
age null
height null

Answer 2

for...in

for(var prop in properties) {
    console.log(properties[prop]);
}