While reviewing typescript declaration files, I noticed that some people write declarations like this:
export function useTheme(): ITheme;I thought that the declare keyword was needed when declaring types for functions defined elsewhere. Is it valid to use
export declare function useTheme(): ITheme;To simplify things, when writing code and you need to declare a function that exists globally but the compiler is unaware of it, you use the declare keyword. However, when dealing with definition files, it's a bit different. These files strictly contain declarations, so all entities are treated as such regardless of whether the declare keyword is used or not. The use of the declare keyword is simply a convention, recommended to ensure that content type is not determined solely based on file extension. While the TypeScript compiler recognizes a d.ts file as a declaration file, other compilers may not.
There is an interface that is heavily used in the project and there is some recurring logic within it. I feel like the current solution is not efficient and I am looking for a way to encapsulate this logic. Current code: interface Person { status: Sta ...
I am facing an issue with canActivate in Angular 2.0.0-rc.3. canActivate(next: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean>{ console.log('canActivate with AclService'); // return true; return Observa ...
When passing an object to the child component using , how can we ensure that changes made to a specific property in the object within the child component are visible in the parent component? In my understanding, changes would not be reflected if we were p ...
I've implemented an interceptor to automatically add headers to each HTTP request without manual intervention. However, I'm facing an issue where the service call inside my interceptor is not triggering for some reason. Below is the code snippet: ...
Our Apollo Client implementation in Next.js (v14.2.5) SSR using the getClient() method is currently facing an issue where cached data is not being updated with the new data from the server. import { HttpLink } from "@apollo/client"; import { re ...
My classes are not specific and they look like this: type SyncReducerAction<TState> = (state: TState, ...args: any[]) => TState; type AsyncReducerAction<TState, TResult, TRest extends any[]> = { promise: (...args: TRest) => Promise< ...
I am trying to determine if any string in an array contains special characters. I have experimented with various methods like RegExp, test, includes, and contains, but none of them give me the desired outcome. Instead, they all return false for every str ...
I am currently working on implementing a component that utilizes dynamic dialog and requires a direct usage. In the DynamicDialog example, there is a constructor in the car demo list component. constructor(private carService: CarService, public ref: Dynami ...
I am currently working in Angular 4 with sibling components, where there are no parent-child relationships, only siblings. One of the siblings is able to successfully retrieve data, particularly the ID from the URL using the code snippet below: public ge ...
What is the best way to set up my distribution build and production deployment workflow for my Node.js server app? Specifically, I am using NestJS API. Here is my current workflow: Commit changes to the production branch Production server with pm2 autom ...
My current project involves developing add-ins for Excel using TypeScript and React. However, I have encountered numerous challenges along the way. Unlike a typical CRA React boilerplate web application, the Office add-in behaves differently. To illustrate ...
I've encountered a dilemma with the code snippet below: class Action { public static DEPENDENCIES: (typeof Action)[] = []; public static MIN_USES: number | null = null; public static MAX_USES: number | null = null; } class SomeAction ext ...
I am trying to set authentication headers for images called from an image tag (<img>). To achieve this, I have created a custom pipe named secureimages using the command ionic g pipe secureimages. This pipe intercepts the HTTP requests in an interce ...
After spending hours trying to fix my issue, I still can't figure it out. I've searched through related threads on SO, but haven't found a solution yet. Issue After successfully signing up, the email verification flag is set to true. Howev ...
Within my DOM, I have dynamically created spans that all have the class "foo". Utilizing TypeScript, I aim to attach an onClick event to each of these spans post-creation. Here is my current approach: var foos = document.body.querySelectorAll(".foo"); f ...
// backend/server.ts import express, { Application, Request, Response } from 'express'; import mongoose from 'mongoose'; import cors from 'cors'; import dotenv from 'dotenv'; const multer = require('multer&apos ...
I'm working on a project with the latest version of WebStorm 2020.3.1 and have multiple tsconfig.json files, but I only want automatic re-compilation for one of them. I've configured everything as shown below. Interestingly, when I run tsc -p ./ ...
One of the components in my project is called flow.component.ts and here is a snippet of the code: var rsi_result: number[]; @Component({ selector: 'flow-home', templateUrl: './flow.component.html', styleUrls: ['./flow.comp ...
Storing a JSON object in a JSON file is important for passing data during an API call. To update the object, replace "it-goes-here" with the following {} block. Newly updated data: { "parenturl":"xxx.com", "user ...
This particular CLI version is designed to work with Angular versions ^11.0.0-next || >=11.0.0 <12.0.0, however an Angular version of 13.0.0 was detected instead. If you need assistance with updating your Angular framework, please refer to the follo ...