#What the best place to put global types?

1 messages · Page 1 of 1 (latest)

fallow pastureBOT
#

Hi @sharp prawn. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:

#

In a Next.js application, global TypeScript type definitions are typically stored in the /types directory. This directory contains global TypeScript type definitions that can be used throughout your application.

Here is an example of how you might define a global type:

// types/index.d.ts
declare global {
  namespace NodeJS {
    interface Global {
      myGlobalVar: string;
    }
  }
}

export {};

In this example, myGlobalVar is a global variable of type string. You can use this type anywhere in your application like so:

global.myGlobalVar = 'Hello, world!';
console.log(global.myGlobalVar); // 'Hello, world!'

Remember to restart your TypeScript server (usually by restarting your IDE) whenever you add new type definitions so that they are properly recognized.

Source: Vercel Templates (https://vercel.com/templates/next.js/medusa)

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@sharp prawn kapa.ai is still learning and improving, please let us know how it did by reacting below

sharp prawn
#

@fallow pasture where is the /types directory and what should i put on my tsconfig?

fallow pastureBOT
#

Let me check the knowledge base for you. One moment! :books:

#

The /types directory is typically located at the root of your project. This is where you would store your global TypeScript type definitions.

As for your tsconfig.json, you should include the /types directory in the include array. Here's an example of how you might configure your tsconfig.json:

{
  "compilerOptions": {
    "skipLibCheck": true
    //...truncated...
  },
  "include": [
    "new-types.d.ts",
    "next-env.d.ts",
    ".next/types/**/*.ts",
    "**/*.ts",
    "**/*.tsx"
  ],
  "exclude": ["node_modules"]
}

In this example, "new-types.d.ts" is a file where you might declare your custom types. "next-env.d.ts" is a file that's automatically generated by Next.js, and you should not modify it because any changes you make will be overwritten. "**/*.ts" and "**/*.tsx" include all TypeScript and TypeScript React files, respectively, in your project.

Sources:

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@sharp prawn kapa.ai is still learning and improving, please let us know how it did by reacting below

sharp prawn
#

@fallow pasturealr but you said i shoud use /types can you show a exemple with multiple custom types ?

fallow pastureBOT
#

Let me check the knowledge base for you. One moment! :books:

#

Sure, let's say you have two custom types that you want to declare globally: CustomType1 and CustomType2. You can create two separate files in the /types directory, each containing one of the type definitions.

Here's an example:

/types/customType1.d.ts

declare type CustomType1 = {
  property1: string;
  property2: number;
};

/types/customType2.d.ts

declare type CustomType2 = {
  propertyA: boolean;
  propertyB: string[];
};

Then, in your tsconfig.json, you would include these files like so:

{
  "compilerOptions": {
    "skipLibCheck": true
    //...truncated...
  },
  "include": [
    "types/**/*.d.ts",
    "next-env.d.ts",
    ".next/types/**/*.ts",
    "**/*.ts",
    "**/*.tsx"
  ],
  "exclude": ["node_modules"]
}

In this configuration, "types/**/*.d.ts" includes all TypeScript definition files in the /types directory. Now, you can use CustomType1 and CustomType2 anywhere in your application.

Please note that the declare keyword is used to declare custom types in a .d.ts file. These types are then available globally throughout your application.

Sources:

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@sharp prawn kapa.ai is still learning and improving, please let us know how it did by reacting below

sharp prawn
#

@fallow pasture how i will use those types for a promise

fallow pastureBOT
#

Let me check the knowledge base for you. One moment! :books:

#

You can use the custom types you've defined with Promises in your Next.js application. Here's an example of how you might use CustomType1 and CustomType2 with Promises:

function fetchData(): Promise<CustomType1> {
  // ...fetch data from an API or other source
  // The returned data should match the structure of CustomType1
}

function processData(): Promise<CustomType2> {
  // ...process data
  // The returned data should match the structure of CustomType2
}

In this example, fetchData is a function that returns a Promise that resolves to data of type CustomType1, and processData is a function that returns a Promise that resolves to data of type CustomType2.

You can then use these functions with async/await:

async function handleData() {
  const data1 = await fetchData();
  const data2 = await processData();

  // data1 is of type CustomType1
  // data2 is of type CustomType2
}

In this example, data1 and data2 are of types CustomType1 and CustomType2, respectively.

Sources:

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@sharp prawn kapa.ai is still learning and improving, please let us know how it did by reacting below

sharp prawn
#

@fallow pasture what should i import

fallow pastureBOT
#

Let me check the knowledge base for you. One moment! :books:

#

When using custom types in TypeScript, you don't need to import them if they are declared in a .d.ts file and included in your tsconfig.json. Once you've declared your custom types in a .d.ts file, they become globally available and can be used anywhere in your application without needing to be imported.

For example, if you have declared CustomType1 and CustomType2 in your .d.ts files as shown in the previous examples, you can use them directly in your TypeScript files like so:

let variable1: CustomType1;
let variable2: CustomType2;

In this example, variable1 and variable2 are of types CustomType1 and CustomType2, respectively.

Sources:

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@sharp prawn kapa.ai is still learning and improving, please let us know how it did by reacting below

sharp prawn
#

@fallow pasture what if i want to declare multiple types into one file

fallow pastureBOT
#

Let me check the knowledge base for you. One moment! :books:

#

You can certainly declare multiple types in a single .d.ts file. Here's an example of how you might do this:

/types/customTypes.d.ts

declare type CustomType1 = {
  property1: string;
  property2: number;
};

declare type CustomType2 = {
  propertyA: boolean;
  propertyB: string[];
};

In this example, CustomType1 and CustomType2 are both declared in the same file. They are now available globally throughout your application.

Remember to include this file in your tsconfig.json:

{
  "compilerOptions": {
    "skipLibCheck": true
    //...truncated...
  },
  "include": [
    "types/**/*.d.ts",
    "next-env.d.ts",
    ".next/types/**/*.ts",
    "**/*.ts",
    "**/*.tsx"
  ],
  "exclude": ["node_modules"]
}

In this configuration, "types/**/*.d.ts" includes all TypeScript definition files in the /types directory.

Sources:

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@sharp prawn kapa.ai is still learning and improving, please let us know how it did by reacting below

sharp prawn
#

@fallow pasture example of a promise with this config

fallow pastureBOT
#

Let me check the knowledge base for you. One moment! :books:

#

Sure, here's an example of how you might use CustomType1 and CustomType2 with Promises:

// Assume that CustomType1 and CustomType2 are defined as follows:
// CustomType1: { property1: string; property2: number; }
// CustomType2: { propertyA: boolean; propertyB: string[]; }

function fetchData(): Promise<CustomType1> {
  // ...fetch data from an API or other source
  // The returned data should match the structure of CustomType1
  return new Promise((resolve) => {
    resolve({
      property1: 'example string',
      property2: 123,
    });
  });
}

function processData(): Promise<CustomType2> {
  // ...process data
  // The returned data should match the structure of CustomType2
  return new Promise((resolve) => {
    resolve({
      propertyA: true,
      propertyB: ['example', 'array', 'of', 'strings'],
    });
  });
}

async function handleData() {
  const data1 = await fetchData();
  const data2 = await processData();

  // data1 is of type CustomType1
  // data2 is of type CustomType2
  console.log(data1, data2);
}

handleData();

In this example, fetchData is a function that returns a Promise that resolves to data of type CustomType1, and processData is a function that returns a Promise that resolves to data of type CustomType2. The handleData function then uses async/await to handle these Promises.

Sources:

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@sharp prawn kapa.ai is still learning and improving, please let us know how it did by reacting below

sharp prawn
#

@fallow pasture

declare type AnimeVideo = {
videos: [
{
id: number;
basename: string;
filename: string;
lyrics: boolean;
nc: boolean;
overlap: string;
path: string;
resolution: number;
size: number;
source: string;
subbed: boolean;
uncen: boolean;
tags: string;
link: string;

  animethemeentries: AnimeThemeEntries;
}

];
};

but i get Cannot find name 'AnimeVideo' when i do a promise

fallow pastureBOT
#

Let me check the knowledge base for you. One moment! :books:

#

It seems like you're trying to use the AnimeVideo type in a Promise, but TypeScript can't find the AnimeVideo type. This could be due to a few reasons:

  1. The AnimeVideo type is not declared in a .d.ts file that's included in your tsconfig.json.
  2. There's a typo in the type name.
  3. The AnimeVideo type is declared in a file that's not imported or referenced where you're trying to use it.

If you've declared the AnimeVideo type in a .d.ts file in the /types directory, make sure that this directory is included in your tsconfig.json:

{
  "compilerOptions": {
    "skipLibCheck": true
    //...truncated...
  },
  "include": [
    "types/**/*.d.ts",
    "next-env.d.ts",
    ".next/types/**/*.ts",
    "**/*.ts",
    "**/*.tsx"
  ],
  "exclude": ["node_modules"]
}

In this configuration, "types/**/*.d.ts" includes all TypeScript definition files in the /types directory.

Here's an example of how you might use the AnimeVideo type with a Promise:

function fetchAnimeVideo(): Promise<AnimeVideo> {
  // ...fetch data from an API or other source
  // The returned data should match the structure of AnimeVideo
}

async function handleAnimeVideo() {
  const animeVideo = await fetchAnimeVideo();

  // animeVideo is of type AnimeVideo
  console.log(animeVideo);
}

handleAnimeVideo();

In this example, fetchAnimeVideo is a function that returns a Promise that resolves to data of type AnimeVideo. The handleAnimeVideo function then uses async/await to handle this Promise.

#

@sharp prawn kapa.ai is still learning and improving, please let us know how it did by reacting below

sharp prawn
#

@fallow pasture should my file be inside a folder inside the types folder

fallow pastureBOT
#

Let me check the knowledge base for you. One moment! :books:

#

Your TypeScript definition files (.d.ts) can be placed directly inside the /types directory or inside a subdirectory within /types. Both will work as long as you include them correctly in your tsconfig.json.

Here's an example of how you might include these files in your tsconfig.json:

{
  "compilerOptions": {
    "skipLibCheck": true
    //...truncated...
  },
  "include": [
    "types/**/*.d.ts",
    "next-env.d.ts",
    ".next/types/**/*.ts",
    "**/*.ts",
    "**/*.tsx"
  ],
  "exclude": ["node_modules"]
}

In this configuration, "types/**/*.d.ts" includes all TypeScript definition files in the /types directory and any of its subdirectories.

Sources:

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@sharp prawn kapa.ai is still learning and improving, please let us know how it did by reacting below

sharp prawn
fallow pastureBOT
#

Let me check the knowledge base for you. One moment! :books:

#

The issue with your function is that you're returning the fetch call directly, but fetch returns a Promise that resolves with the Response object, not the actual data. You need to parse the response as JSON to get the data.

Here's how you can modify your function:

export async function getVideo(): Promise<AnimeVideo> {
  const response = await fetch("<https://api.animethemes.moe/video?sort=random&page[size]=1&include=animethemeentries.animetheme.anime&filter[has]=animethemeentries.animetheme&filter[animetheme][type]=OP">);
  if (!response.ok) {
    throw new Error(`HTTP error! status: ${response.status}`);
  }
  const data = await response.json();
  return data;
}

In this modified function, I'm using async/await to handle the Promise returned by fetch. I'm also checking if the response is ok (status in the range 200-299) before parsing it as JSON. If the response is not ok, I'm throwing an error.

Remember to handle any errors that might occur when you call this function:

try {
  const video = await getVideo();
  // Use video here
} catch (error) {
  console.error('Failed to fetch video:', error);
}

In this example, I'm using a try/catch block to handle any errors that might occur when calling getVideo.

Sources:

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@sharp prawn kapa.ai is still learning and improving, please let us know how it did by reacting below

sharp prawn
#

@fallow pasture

declare type AnimeVideo = {
videos: [
{
id: number;
basename: string;
filename: string;
lyrics: boolean;
nc: boolean;
overlap: string;
path: string;
resolution: number;
size: number;
source: string;
subbed: boolean;
uncen: boolean;
tags: string;
link: string;

  animethemeentries: AnimeThemeEntries;
}

];
};

Property 'videos' is missing in type 'Promise<AnimeVideo>' but required in type 'AnimeVideo'.

fallow pastureBOT
#

Let me check the knowledge base for you. One moment! :books:

#

The error message you're seeing is indicating that the Promise<AnimeVideo> returned by your function does not have a videos property, which is required by the AnimeVideo type.

This is because the fetch function returns a Promise that resolves with the Response object, not the actual data. You need to parse the response as JSON to get the data.

Here's how you can modify your function:

export async function getVideo(): Promise<AnimeVideo> {
  const response = await fetch("<https://api.animethemes.moe/video?sort=random&page[size]=1&include=animethemeentries.animetheme.anime&filter[has]=animethemeentries.animetheme&filter[animetheme][type]=OP">);
  if (!response.ok) {
    throw new Error(`HTTP error! status: ${response.status}`);
  }
  const data: AnimeVideo = await response.json();
  return data;
}

In this modified function, I'm using async/await to handle the Promise returned by fetch. I'm also checking if the response is ok (status in the range 200-299) before parsing it as JSON. If the response is not ok, I'm throwing an error.

Remember to handle any errors that might occur when you call this function:

try {
  const video = await getVideo();
  // Use video here
} catch (error) {
  console.error('Failed to fetch video:', error);
}

In this example, I'm using a try/catch block to handle any errors that might occur when calling getVideo.

#

@sharp prawn kapa.ai is still learning and improving, please let us know how it did by reacting below

sharp prawn
#

@fallow pasture this don't solve my issue

var videoUrl = video.videos[0].link

Property 'videos' is missing in type 'Promise<AnimeVideo>' but required in type 'AnimeVideo'.

fallow pastureBOT
#

Let me check the knowledge base for you. One moment! :books:

#

The error message you're seeing is because you're trying to access the videos property on a Promise<AnimeVideo>. A Promise is an object that represents a value that may not be available yet. To access the videos property, you need to wait for the Promise to resolve.

You can do this using the await keyword in an async function:

async function fetchAndUseVideo() {
  try {
    const video = await getVideo();
    var videoUrl = video.videos[0].link;
    // Use videoUrl here
  } catch (error) {
    console.error('Failed to fetch video:', error);
  }
}

fetchAndUseVideo();

In this example, fetchAndUseVideo is an async function that fetches the video data using the getVideo function, waits for the Promise to resolve, and then accesses the videos property.

Sources:

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: