Recent questions tagged typescript

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typescript - How to structure utility class

I have several utility functions. What is the best way to package these up, and then import them? This is what ... does not exist on type util. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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typescript - How to run a service when the app starts in Angular 2

I created a service SocketService, basically it initializes the socket to let the app listen on the port. This ... I do it correctly? Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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typescript - "private" and "public" in Angular component

If I don't add private before foo, loadBar, andtext, I believe they are public by default. export class ... private text: string; } Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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typescript - Angular - "has no exported member 'Observable'"

Typescript code: import { Injectable } from '@angular/core'; import { Observable } from 'rxjs/Observable'; ... json file with Angular version: See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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typescript - node_modules/rxjs/internal/types.d.ts(81,44): error TS1005: ';' expected error after installation of Angular 6

I got an error of node_modules/rxjs/internal/types.d.ts(81,44): error TS1005: ';' expected. after the ... ): error TS1109: Expression expected. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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typescript elegantly enforce a constraint while preserving types

so originally to enforce a constraint, i'd just apply an interface like this // this is the constraint ... a different approach? thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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typescript - ionic 3 native plugins stopped working . I tried putting ngx at last.the red line error is gone.But the plugin is not working

import { Market } from '@ionic-native/market/ngx'; constructor(public platform: Platform, public statusBar: StatusBar ... working. Please help. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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782 views

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typescript - Angular-SpringBoot downlod excel file HttpErrorResponse

I am working a spring boot server with an angular front page. I have a service to download a .xlsx file from ... .js:3240:31) at Object` See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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typescript - why is return type `null` (or any other type) assignable to return type `void`?

As you may know, in strict mode only undefined is assignable to type void. So if you try: declare let _void: void ... this a bug or a feature? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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typescript - Angular 4 : Mega menu is not closed after clicked on a menu inside it

I am working in an angular 4 project ,In this I have a mega menu .What I want to do is when I clicked on a ... can anyone help me to fix it . See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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760 views

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typescript - Angular how to get headers value in the canActive function?

I need to redirect into different user page depends on the userRole value received from the header. angular. ... recieve he header value. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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799 views

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typescript - Issue when using distributive conditional types combined with generic method

I've been trying to make a generic function which receives and object T and receives a string property name ... type 'string'. Playground link See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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typescript - Password validation is not working in Angular 5

I am new to angular 5 ,Here I am trying to validate user password based on some conditions . Minimum six ... the pattern directly in HTML). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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typescript - @Inject custom provider in Angular 2.0.1

i have issue with my custom provider in Angular 2.0.1. I create a custom provider for my http request to add ... }) export class AppModule { } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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typescript - Electron & Angular: fs.existsSync is not a function

I've created a new Electron-Project with Angular. I build my app with the Angular CLI. Now, I want to communicate ... and hope, you can help me. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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871 views

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typescript - Is modifying method's return type by decorator possible?

Let's imagine that I have an A decorator that is being applied on a method that returns a string. The decorator ... fact returns B, not string? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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typescript - Infer tuple type instead of union type

Does anybody know how to make compiler to infer tuple type automatically ? // Now: (string | number)[] // Wanted: [string, ... 2], ["b", 2] ]; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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813 views

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typescript - Make two types different by parameter

Consider next simplified example: type Ref<T extends {id: string}> = T['id'] This type represents ref to object ... compile check for it in TS? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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typescript - Using enums as types allows values that don't exist in the enum

I have this typescript code (typescript playground): const enum Something { None = 0, Email = 10, All = 20 } ... enum, so shouldn't it throw? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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870 views

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typescript - Conditional injection of a service in AngularJS

I have defined a service like this : angular.module('myApp').service('myService', [ '$rootScope', ... ... I want ... if the user is an old one. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.3k views

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typescript - Importing an external module in TS causes "ReferenceError: require is not defined"

So when importing an external module like so import GameObjects = module("GameObjects") the outputed JS has this at ... I get by this error? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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typescript - Angular 2 Injectable Interface?

Today I stumbled upon something that I didn't think would cause me trouble. In Java and Spring, I can declare ... out to an alternative design? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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650 views

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typescript - What is "type '{}'"?

In TypeScript, what exactly is type '{}' and how does it relate to other built-in types? For example, ... : number = call(get_the_answer); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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typescript - Angular2 (rc4) - Check active child route in parent component

I am trying to check the active child route in a parent component, but I am having difficulties with it. I ... a parent component. Any ideas? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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851 views

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typescript - ngControl with ngFor in Angular2

Q1. Is it possible to have one Control ie: ValidNumber = new Control('', CustomValidators.number({min:1, ... want from ngControl is Validation. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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805 views

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typescript - Combining generics with index type

Since this works: const f = <T extends string>(x: T) => x; f(""); interface Dictionary<T> { [key ... string which is required by indexed type). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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849 views

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typescript - Electron, Angular2, "fs"

I am very new to the topic of Angular, Javascript etc. I try to write a (TypeScript) Angular2-Electron application which ... >  See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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910 views

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typescript - Angular2: Inject a non @Injectable class

angular: 2.0.0-beta.9 Is it possible to inject a non @Injectable class into a component ? For example, this ... come from a Third party library. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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