我正在尝试构建一个类型脚本类，其中有一些属性与访问修饰符，如下面的代码。

class Coder {
    age : number;

    constructor(
    public readonly name : string,
    age : number,
    public lang : string,
    private address : string,
    protected id : number = 234
    )
    {
        this.name = name;
        this.age = age;
        this.lang = lang;
        this.address = address;
        this.id = Math.random();
    }

    getName()
    {
        return `My name is ${this.name}`;
    }
}

let coder = new Coder('Nayan', 28, 'JavaScript', 'LMP');

// Not possible as name is readOnly
// coder.name = 'Golu';

但是编译后的代码在构造函数中有一个具有重复属性标记的类，如下面的代码所示。
一旦我试图删除任何修饰符，那么重复的属性也会在编译的js文件中被删除（参见age属性）。

"use strict";
class Coder {
    constructor(name, age, lang, address, id = 234) {
        this.name = name;
        this.lang = lang;
        this.address = address;
        this.id = id;
        this.name = name;
        this.age = age;
        this.lang = lang;
        this.address = address;
        this.id = Math.random();
    }
    getName() {
        return `My name is ${this.name}`;
    }
}
let coder = new Coder('Nayan', 28, 'JavaScript', 'LMP');
// Not possible as name is readOnly
// coder.name = 'Golu';

不知道为什么会发生这种情况，因为它只是违反了DRY规则。