typescript中使用自定义declare class，去a

not constructable问题:

declare class AliOSS {
    public ossBucket: string;
    public expiration: number;
    public put: (key: string, path: string) => { ossKey: string, ossBucket: string; url: string};
    public url: string;
    constructor(args: Object);
}
// 方法1：使用typeof
const OSS = require("ali-oss") as typeof AliOSS;
const _ossClient = new OSS({
    region: 'oss-cn-shanghai',
    endpoint: data.endpoint,
    accessKeyId: data.accessKeyId,
    accessKeySecret: data.accessKeySecret,
    stsToken: data.securityToken,
    bucket: data.bucketName,
    protocol: data.protocol
});

// 方法2： 使用Constructable和泛型
type Constructable<T> = new(...args: Object[]) => T;
const OSS = require("ali-oss") as Constructable<AliOSS>;
const _ossClient = new OSS({
    region: 'oss-cn-shanghai',
    endpoint: data.endpoint,
    accessKeyId: data.accessKeyId,
    accessKeySecret: data.accessKeySecret,
    stsToken: data.securityToken,
    bucket: data.bucketName,
    protocol: data.protocol
});