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16.2: Using 3rd Party Libraries - Coggle Diagram

- - - - import axios from "axios"; axios.get...
    - - when we type a dot #
  - - - Go to Type Definition
    - - node_modules/axios/index.d.ts
      - which contains type definition
        
        export class Axios { ... get<T = any, ... ... export default axios;
      - in the axios folder
        
        installed into node_modules
    - - :warning: not all libraries do
      - can tell if a library provides them
        
        look in package.json for
        
        "types": "index.d.ts",
- - - - import _ from "lodash";
    - - Could not find a declaration file for module 'lodash'.
      - couldn't find a type declaration file
      - lodash doesn't come with one :!!:
        
        unlike axios #
  - - - why savedev?
        
        don't need the types in production :warning:
      - creates folder called node_modules/@types/lodash
        
        which contains
        
        .d.ts files
      - error is gone :explode: #
    - - references the DefinitelyTyped project
        
        a repository containing
        
        over 7000 type definitions
        
        covering all popular libraries