When comparing the two options of importing from a module, which is better:
import * as util from "./Util"
or
import {someFunction} from "./Util"
?
When comparing the two options of importing from a module, which is better:
import * as util from "./Util"
or
import {someFunction} from "./Util"
?
Util
is imported using import * as util from "./Util"
, which is the equivalent of require("./Util")
in CommonJS. ES6 imports allow for direct object destructuring assignments, enabling treeshakable libraries. Treeshaking involves importing only the necessary code of a module, making it beneficial for web-based projects. One example is @angular/flex-layout
, where the whole library size is 17.6kB but individual exports are much smaller.
While using this technique for local files may not be fully efficient since unused parts of a module specific to a project are rarely encountered, it is still a good practice. The usage of a module can evolve as a project progresses, making tree shaking valuable for optimization.
Do you see any issues with the object being an instance of ChatRoom? Let me know your thoughts. Class: export class ChatRoom { public id?: number; public name_of_chat_room: string; public chat_creator_user_id: number; public chat_room_is_active: 0 ...
I added the cors package and confirmed that it's inside the node_modules directory. However, I keep encountering this error message. /usr/src/app/node_modules/ts-node/src/index.ts:859 server | return new TSError(diagnosticText, diagnosticCodes, ...
I recently made changes to my interface and class structure: export interface State { arr : any[]; } export const INITIAL_STATE: State = { arr: [] }; This updated code compiles without any issues. Now, I decided to modify the Interface to incl ...
I am working on displaying a list of enable/disable buttons for different users. The goal is to show the appropriate button for each user based on their status - enabling if disabled and disabling if enabled. To achieve this, I have utilized the flags "use ...
After developing a serverless GraphQL API function using Azure functions and connecting it to Cosmos DB, I have encountered an issue with "Invalid URL" that has been puzzling me for a week. Despite running the graphql function locally without any problems, ...
There is a function that returns an object with two properties (res, mes) where one of them could be null: const fetchJSON = <Res, Body>(link: string, body: Body): Promise<{ res: Res; mes: null } | { res: null; mes: Popup }> => { return n ...
Currently, I am in the process of developing a Backend using Express and following the MVC Model. However, I am uncertain about where to handle errors effectively. I have integrated express-async-errors and http-errors, allowing me to throw Errors anywher ...
I attempted to create a cached mongoose connection for my Next.js + Typescript application, but the code I used was: let cached = global.mongoose; if (!cached) { cached = global.mongoose = { conn: null, promise: null }; } The use of global.mongoose res ...
Currently implementing Angular 8, my objective is to utilize downloaded SVG icons through a .js library. To achieve this, I have made the necessary additions to my .angular.json file: "scripts": [ "node_modules/csspatternlibrary3/js/site ...
One of the challenges I'm facing involves working with an interface structured like this: export interface SeriesCard { type: string, imageUrl: string, title: string, category: string, seriesItems: SeriesItems[]; } Currently, my Service con ...
While working in TypeScript, I need to create around 100 instances of Promise. However, I am only interested in waiting for the resolution of 5 of them. Any promises beyond that can either be canceled (if feasible) or rejected since they are no longer requ ...
Here is a snippet of code <div class="row"> <div class="col-sm-12 visible-print"> Content (display in full width when printed) </div> <div class="col-sm-6 hidden-print"> Content (same as above but only half width when ...
I am facing an issue with a function that retrieves values from an array, and I wish to dynamically return these values. const AvailableUserRoles = [ { label: 'Administrator', value: 1 }, { label: 'Count', value: ...
I am faced with the following scenario: // symbols.ts - Injection Key defined as a Symbol export const FAQ_SERVICE: InjectionKey<FAQService> = Symbol('FAQService'); // main.ts - globally provides a service using the injection key app.provi ...
As a beginner in react and redux, I am currently self-studying the concepts. States in my tic-tac-toe project are managed using redux. My goal is to determine the winner when X or O are aligned on the board. Below is my code: // store.ts import { co ...
In my Angular project, the structure is organized as follows: /(root or repo folder) |_ projects |_ mylib (main library to be exported from the repo) |_ sample-app (created for testing 'mylib' project in other projects) To manage appli ...
I'm attempting to enable type covariance so that Type<Cat> can be treated as a Type<Animal>, for instance, treating a list of Cats as a list of Animals. However, using the type T[keyof T] in a method within the Type interface seems to hind ...
I am currently following an official tutorial on creating a global theme for my app. In my root component, I am setting up the global theme like this: const themeInstance = { backgroundColor: 'cadetblue' } render ( <ThemeProvider theme ...
Recently, I've delved into Style Components in my journey to create a weather app using React Native. In the past, I would typically resort to CSS modules for styling, but it appears that this approach is not feasible for mobile development. Below is ...
I encountered an issue with my TypeScript Express project while attempting to implement a CSP Nonce using Helmet. app.use(helmet.contentSecurityPolicy({ useDefaults: true, directives: { scriptSrc: ["'self'", (req, res) = ...