为内部阶级创造打字?

时间:2017-09-07 00:27:43

标签: typescript typescript-typings

我正在尝试使用RemoteObject

在Salesforce项目中使用typescript

但是,我不确定如何为外部javascript对象的语法创建输入法。

javascript中使用代码的示例:

var ct = new RemoteObjectModel.Contact({
    FirstName: "Aldo",
    LastName: "Michaels",
    Phone: "(415) 555-1212"
});

绊倒我的部分是new RemoteObjectModel.Contact()。如何为此创建界面?

以下是我试图编译的代码示例

import React from 'react'
import ReactDOM from 'react-dom'

declare module RemoteObjectModel {
   export class Account implements IRemoteObject {
       constructor();
       constructor();
       get;
       set;
   }
}

interface IRemoteObject{
    get(field: string): any;
    set(field: string, value: string): any;
}

interface IAppProps{
    remoteObjectModel: RemoteObjectModel
}

export class App extends React.Component<IAppProps, {}>{
    public state : IAppState;

    constructor(props : IAppProps) {
        super(props);

        this.state = {
            accounts: 0
        };
    }

    public render(){
        let account: IRemoteObject = new this.props.remoteObjectModel.Account({
            Name : 'hello!',
            Active : true
        });
        console.log(account);
        return (
            <div>
                New Accounts: {this.state.accounts}
                Account: {account.get('Name')}
            </div>
        )
    }
}

//set on the global state
declare var remoteObjectModel : IRemoteObjectModel;

ReactDOM.render(<App remoteObjectModel={remoteObjectModel} />, document.getElementById('app'));

这不起作用。 IAppProps有错误:

  

消息:'找不到名称'RemoteObjectModel'。'

此外,我不确定我的问题标题是否正确反映了问题(如果没有,请更新!)

1 个答案:

答案 0 :(得分:1)

如果将RemoteObjectModel定义为类,则确实无法在其中定义嵌套类Contact

但是,您可以使用typescript的declaration merging功能 - 您可以将名称空间RemoteObjectModel与同名的类(或接口)一起声明,并在该名称空间中声明类Contact (不要忘记export否则它将无法在命名空间外看到。

然后,粗略地说,只要打字稿单独看到RemoteObjectModel,它就会引用该类,每当它看到RemoteObjectModel.something时,它就会引用命名空间。

这样的事情:

class RemoteObjectModel {
    someProperty: string;
    constructor() {
        this.someProperty = 'someValue';
    }
}

namespace RemoteObjectModel {

    export class Contact {
        FirstName: string;
        LastName: string;
        Phone: string;

        constructor(values: ContactProperties) {
            Object.assign(this, values);
        }
    }
}

interface ContactProperties {
    FirstName: string;
    LastName: string;
    Phone: string;
}

var ct = new RemoteObjectModel.Contact({
    FirstName: "Aldo",
    LastName: "Michaels",
    Phone: "(415) 555-1212"
});

此外,您可以在RemoveObjectModel课程中定义constructor signature,允许您拨打new remoteObjectModel.Contact(),就像在实例上定义Contact一样:

class RemoteObjectModel {
    someProperty: string;
    Contact: {new(p: ContactProperties): RemoteObjectModel.Contact}
}

namespace RemoteObjectModel {

    export class Contact {
        FirstName: string;
        LastName: string;
        Phone: string;

        constructor(values: ContactProperties) {
            Object.assign(this, values);
        }
    }
}

interface ContactProperties {
    FirstName: string;
    LastName: string;
    Phone: string;
}

const remoteObjectModel = new RemoteObjectModel();

var c2 = new remoteObjectModel.Contact({
    FirstName: "Aldo",
    LastName: "Michaels",
    Phone: "(415) 555-1212"
});

或者,您可以声明实例属性Contact,其类型为&#39;静态部分&#39; Contact {(可以用作构造函数),使用typeof Contact

class RemoteObjectModel {
    someProperty: string;
    Contact: typeof RemoteObjectModel.Contact
    constructor() {
        this.Contact = RemoteObjectModel.Contact;
    }
}
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