Recent questions tagged typescript

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typescript - Using external library with angular cli

I have installed one 3rd party module jsPDF with my angular app. The module works perfectly but I get an ... . Is something missing here? 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 - Do subscriptions to rxjs Subjects cause memory leaks if not unsubscribed when the subject goes out of scope?

In my application I have some objects which represent local currency, and other objects which represent currency exchange ... goes out of scope? 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 - Generic argument constrained to be non array

is there a way to say that passed type argument of a method cannot be an array?? example class class A { public f<T ... .f<number[]>([42, 42]); 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 Omit type on classes with a index type signature results in minimum properties not being required

I have a class which has some mandatory properties and can then have other properties defined by classes extending this ... what's going on? 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 handle a project with multiple tsconfig.json files?

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

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typescript - What are the differences between the empty object type and Object?

I've noticed that TypeScript supports using the following types: {} (referred to in the specs as Empty ... are the differences between them? 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 - Optional chaining on the left side in Javascript

Is it possible to use the optional chaining operator in the left side of an assignment = in Javascript? const ... ; // Is this possible? 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 - tsconfig.json - Only build ts files from folder

I am currently trying to build my ts files into a single ts files. The issue I'm getting is that my code ... to be only www/app? 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 - Type for non-false, aka truthy

In TypeScript, is there a type for truthy? I have this method: Object.keys(lck.lockholders).length; enqueue(k: any, ... , as the key to a hash. 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 extend Mocha's Context interface?

Take the following code snippet: import { Foo } from "./foo"; export interface MyContext extends Mocha.Context ... in my testing environment? 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: converting a json get response to class with functions

So basically I have an Angular component that has a variable of type DashboardConfiguration that is being set to ... calls the service above } 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 one of generic types from function argument

Consider the following example. fetchItems function returns response or response body depending on passed onlyBody ... /edit/typescript-ydkmzk 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 retrieve a type from a nested property using a "path tuple"

Given this (amazing) piece of code found in Typescript: deep keyof of a nested object type Cons<H, T> = T ... foo is not up to this task. 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 - When and how s decorator applied to the decorated classes from the @angular packages

If I use a decorator in my class the decorator is evaluated when importing the class. Here is the small ... classes from the @angular packages. 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 - Getting and using Microsoft Graph token in Angular 6 to get group membership from Azure

I have an Angular 6 app where I am authenticating the user using microsoft-adal-angular6 against Azure Active ... that would be appreciated. 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 - Interface is allowing extra property when it is used as return type of a function

An inteface seems to accept extra property(ies) when it is assigned as a return of a function via a type. For ... (ies) to the returned 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 - Heroku can't find ts-node

I am using Colyseus for my multiplayer game. The framework generated a typescript server which I tried to deploy to ... 't Heroku find ts-node? 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 - Issue with RxJs BehaviorSubject's subscriber not being notified of value change

I am trying to use a RxJS BehaviorSubject that contains a boolean representing whether or not a user is connected/ ... .next(true) is invoked. 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 - Call a service function from browser console in angular 6

I have just made a few changes to some methods in one of the services, and wanted to see if the changes had worked ... ][token][001]")); } } 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 - AG-Grid: show certain "action" buttons in grid depending on condition

I'm using the community edition of "AG Grid" in my Angular 6 application. My challenge right now is this: ... column, in my column definitions? 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 unit testing component, mocking ContentChildren

I am implementing a wizard component in Angular 2 RC4, and now I am trying to write som unit tests. Unit ... , I would greatly appreciate 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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typescript - How to get PDF through API in angular service

I have a Java based API set up on a server. URL = "ex.com" It has an endpoint which returns a PDF ... do with in Angular. Appreciate the 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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typescript - Use requestAnimationFrame in a class

I'm having problem finding out how I can use requestAnimationFrame in a class. This code is working fine: window. ... me what's wrong here? 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 - Implement an indexible interface

How would I implement an interface that is indexible: interface fooInterface{ // indexable [index:string]:number; [index ... / What goes here? } 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 - Destructured parameter properties in constructor

Typescript allows parameter properties class ParameterProperty { constructor(private member: number) {} } The above ... values from Types. 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 observe touched event on Angular 2 NgForm?

It is possible to subscribe a callback to an NgForm's valueChanges observable property in order to react to ... "control touched" event? 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 - Building a class registry: Cannot use 'new' with an expression whose type lacks a call or construct signature

I have this setup: //./things/Base.ts export default class Base{ constructor(){ console.log("HI I AM A BASE ... and what's the proper idiom? 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 - Toggle Multiple Fields On/Off in Formbuilder, clean syntax in Angular?

We have a Formbuilder with multiple fields. Sometimes, requirements want to toggle certain fields. We can ... updateValueAndValidity(); } etc See Question&Answers more detail:os...

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

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