将类型编码转换为Javascript代码？

Question

我正在使用Shopify's Node Api教程创建一个Redis商店。但是，提供的代码块在类型记录中，我的整个项目都是用javascript (React/nextjs)编写的。我已经工作了几个小时，试图将代码转换为可使用的代码，但无法使它在我的项目中正常工作。真的很纠结于此。

如何将下面的代码块从类型记录转换为javascript？

/* redis-store.ts */

// Import the Session type from the library, along with the Node redis package, and `promisify` from Node
import {Session} from '@shopify/shopify-api/dist/auth/session';
import redis from 'redis';
import {promisify} from 'util';

class RedisStore {
  private client: redis.RedisClient;
  private getAsync;
  private setAsync;
  private delAsync;

  constructor() {
    // Create a new redis client
    this.client = redis.createClient();
    // Use Node's `promisify` to have redis return a promise from the client methods
    this.getAsync = promisify(this.client.get).bind(this.client);
    this.setAsync = promisify(this.client.set).bind(this.client);
    this.delAsync = promisify(this.client.del).bind(this.client);
  }

  /*
    The storeCallback takes in the Session, and sets a stringified version of it on the redis store
    This callback is used for BOTH saving new Sessions and updating existing Sessions.
    If the session can be stored, return true
    Otherwise, return false
  */
  storeCallback = async (session: Session) => {
    try {
      // Inside our try, we use the `setAsync` method to save our session.
      // This method returns a boolean (true if successful, false if not)
      return await this.setAsync(session.id, JSON.stringify(session));
    } catch (err) {
      // throw errors, and handle them gracefully in your application
      throw new Error(err);
    }
  };

  /*
    The loadCallback takes in the id, and uses the getAsync method to access the session data
     If a stored session exists, it's parsed and returned
     Otherwise, return undefined
  */
  loadCallback = async (id: string) => {
    try {
      // Inside our try, we use `getAsync` to access the method by id
      // If we receive data back, we parse and return it
      // If not, we return `undefined`
      let reply = await this.getAsync(id);
      if (reply) {
        return JSON.parse(reply);
      } else {
        return undefined;
      }
    } catch (err) {
      throw new Error(err);
    }
  };

  /*
    The deleteCallback takes in the id, and uses the redis `del` method to delete it from the store
    If the session can be deleted, return true
    Otherwise, return false
  */
  deleteCallback = async (id: string) => {
    try {
      // Inside our try, we use the `delAsync` method to delete our session.
      // This method returns a boolean (true if successful, false if not)
      return await this.delAsync(id);
    } catch (err) {
      throw new Error(err);
    }
  };
}

// Export the class
export default RedisStore;

Answer 1

只需将所有类型记录代码保存在一个.ts文件中(可能是redis-store.ts)。然后，只运行如下所示的tsc命令，使用typescript编译器将javascript转换为您的版本

tsc redis-store.ts

有关更多编译器选项，请访问下面的https://www.typescriptlang.org/docs/handbook/compiler-options.html

Answer 2

基本上，您需要摆脱所有类型(会话和字符串)，并将private切换到#，可能如下所示：

/* redis-store.js */

import redis from 'redis';
import {promisify} from 'util';

class RedisStore {
  #client;
  #getAsync;
  #setAsync;
  #delAsync;

  constructor() {
    // Create a new redis client
    this.client = redis.createClient();

    this.getAsync = promisify(this.client.get).bind(this.client);
    this.setAsync = promisify(this.client.set).bind(this.client);
    this.delAsync = promisify(this.client.del).bind(this.client);
  }

  storeCallback = async (session) => {
    try {
      // Inside our try, we use the `setAsync` method to save our session.
      // This method returns a boolean (true if successful, false if not)
      return await this.setAsync(session.id, JSON.stringify(session));
    } catch (err) {
      // throw errors, and handle them gracefully in your application
      throw new Error(err);
    }
  };

  /*
    The loadCallback takes in the id, and uses the getAsync method to access the session data
     If a stored session exists, it's parsed and returned
     Otherwise, return undefined
  */
  loadCallback = async (id) => {
    try {
      // Inside our try, we use `getAsync` to access the method by id
      // If we receive data back, we parse and return it
      // If not, we return `undefined`
      let reply = await this.getAsync(id);
      if (reply) {
        return JSON.parse(reply);
      } else {
        return undefined;
      }
    } catch (err) {
      throw new Error(err);
    }
  };

  /*
    The deleteCallback takes in the id, and uses the redis `del` method to delete it from the store
    If the session can be deleted, return true
    Otherwise, return false
  */
  deleteCallback = async (id) => {
    try {
      // Inside our try, we use the `delAsync` method to delete our session.
      // This method returns a boolean (true if successful, false if not)
      return await this.delAsync(id);
    } catch (err) {
      throw new Error(err);
    }
  };
}

// Export the class
export default RedisStore;