Most viewed questions in TypeSript

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How to use moment.js library in angular 2 typescript app?

REFERENCE: https://momentjs.com/docs/#/use-it/typescript/ You can install this by using: npm install ...READ MORE

Jun 1, 2022 in TypeSript by Nina
 • 3,060 points • 1,354 views
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Typescript error (2345) when pushing element to array of elements(React js)?

I'm pretty new to Typescript and I ...READ MORE

Jul 5, 2022 in TypeSript by Nina
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Typescript open-api cilent generation and usage of `fetch`

I am trying to generate a typescript ...READ MORE

Jul 18, 2022 in TypeSript by Logan
 • 2,140 points • 1,285 views
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Why typescript complains that XXX is assignable to the constraint of type 'T', but 'T' could be instantiated with a different subtype of constraint X?

My code is this: export interface TreeItem { ...READ MORE

Jul 18, 2022 in TypeSript by Logan
 • 2,140 points • 1,283 views
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Experimental decorators warning in TypeScript compilation

Although VS Code is an excellent editor ...READ MORE

Aug 3, 2022 in TypeSript by Abhinaya
 • 1,160 points • 1,265 views
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TypeScript type cast & D3.js errors

Now, how should I solve this/typecast this? import ...READ MORE

Jul 18, 2022 in TypeSript by Logan
 • 2,140 points • 1,239 views
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ngx-image-cropper imageloaded() not passing any image data to typescript file event method

I'm using ngx-image-cropper to load and crop images. According ...READ MORE

Jul 5, 2022 in TypeSript by Logan
 • 2,140 points • 1,234 views
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What is "ambient" in TypeScript

Ambient simply means "without implementation". Ambient declarations only exist ...READ MORE

Jun 22, 2022 in TypeSript by Nina
 • 3,060 points • 1,186 views
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Is there any official Typescript definition for fabric.js?

Typically, packages in Definitely Typed aren't official ...READ MORE

Aug 3, 2022 in TypeSript by Abhinaya
 • 1,160 points • 1,112 views
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Why typescript complains that XXX is assignable to the constraint of type 'T', but 'T' could be instantiated with a different subtype of constraint X?

My code is this: export interface TreeItem { ...READ MORE

Jul 13, 2022 in TypeSript by Logan
 • 2,140 points • 1,102 views
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1 answer

Angular ForEach in Typescript?

Try this: selectChildren(data, $event) { ...READ MORE

Jun 7, 2022 in TypeSript by Nina
 • 3,060 points • 1,088 views
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What is the question mark for in a Typescript parameter name?

It is to mark the parameter as optional. TypeScript ...READ MORE

Aug 3, 2022 in TypeSript by Abhinaya
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How can I include pug templates in compiled typescript?

My nodejs based application uses Pug for ...READ MORE

Jul 13, 2022 in TypeSript by Logan
 • 2,140 points • 1,060 views
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Jest + Typescript cannot mock AWS transcribe function

I've been trying to figure out how ...READ MORE

Jul 14, 2022 in TypeSript by Logan
 • 2,140 points • 1,037 views
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Stepper Material : using stepper.reset() inside TypeScript

Is it possible to use stepper.reset() inside ...READ MORE

Jul 5, 2022 in TypeSript by Nina
 • 3,060 points • 1,028 views
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Error when calling theme Props in component using ReactJs and Typescript

I need to pass the color of ...READ MORE

Jul 5, 2022 in TypeSript by Nina
 • 3,060 points • 1,009 views
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1 answer

How to define props in TypeScript where a parent component injects props in its children?

Typescript doesn't remove this special rule "!text" ...READ MORE

Jun 16, 2022 in TypeSript by Nina
 • 3,060 points • 983 views
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What does the ! (exclamation mark) do in TypeScript?

The exclamation mark is called the non-null ...READ MORE

Jun 1, 2022 in TypeSript by Nina
 • 3,060 points • 952 views
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Angular & eslint - Definition for rule '@typescript-eslint/space-infix-ops' was not found

I recently removed the tslint from my ...READ MORE

Aug 1, 2022 in TypeSript by Elton
 • 400 points • 909 views
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Using spread syntax and new Set() with typescript

This seems to be a typescript ES6 ...READ MORE

Aug 3, 2022 in TypeSript by Abhinaya
 • 1,160 points • 895 views
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How to get webriver io typescript working wdio wizard?

I'm Putting together a WebdriverIO project with ...READ MORE

Jul 5, 2022 in TypeSript by Nina
 • 3,060 points • 850 views
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1 answer

TypeScript, Angular & ESlint - Definition for rule '@typescript-eslint/space-infix-ops' was not found

I managed to resolve this by forcing ...READ MORE

Jun 16, 2022 in TypeSript by Nina
 • 3,060 points • 834 views
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Typescript: Changing the definition of some third party types d.ts

I am a little bit lost how ...READ MORE

Jul 18, 2022 in TypeSript by Logan
 • 2,140 points • 824 views
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TypeScript types to restrict array values

Can I use TypeScript types to restrict ...READ MORE

Jul 18, 2022 in TypeSript by Logan
 • 2,140 points • 762 views
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Karma, Typescript definition file not loading

I am working on setting up development ...READ MORE

Jun 22, 2022 in TypeSript by Logan
 • 2,140 points • 755 views
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TypeScript -- new Image() from global scope

I have a class MYMODULE.Image{}, but I ...READ MORE

Jul 13, 2022 in TypeSript by Logan
 • 2,140 points • 745 views
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1 answer

Typescript: how to define message type for broker consumer

Our main goal - is to make ...READ MORE

Jun 15, 2022 in TypeSript by Nina
 • 3,060 points • 731 views
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How to add and declare new property to class using decorator in typescript (angular)

I'm trying to add new property to ...READ MORE

Jul 5, 2022 in TypeSript by Logan
 • 2,140 points • 709 views
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Create a react app react 18 with typescript

I am trying to create react 18 ...READ MORE

Jul 5, 2022 in TypeSript by Logan
 • 2,140 points • 688 views
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1 answer

How to create enum type in TypeScript?

TypeScript 0.9+ has a specification for enums: enum ...READ MORE

Jun 8, 2022 in TypeSript by Nina
 • 3,060 points • 658 views
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1 answer

Destructure a function parameter in Typescript

You can use the object de-structuring syntax: createUser(parent: ...READ MORE

Jun 9, 2022 in TypeSript by Nina
 • 3,060 points • 652 views
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1 answer

Chutzpah configuration for running TypeScript tests in both Visual Studio and Visual Studio Team Services build

I'm not sure if this response is ...READ MORE

Jun 16, 2022 in TypeSript by Nina
 • 3,060 points • 650 views
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1 answer

Wildcard module declaration not work in TypeScript 2, why?

I managed to resolve this by forcing ...READ MORE

Jun 16, 2022 in TypeSript by Nina
 • 3,060 points • 633 views
0 votes
1 answer

What does the @ (at sign) sign do in TypeScript?

The big news this week is the ...READ MORE

Jun 10, 2022 in TypeSript by Nina
 • 3,060 points • 629 views
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React Typescript: It looks like you're trying to use TypeScript but do not have typescript installed

I want to create a React application ...READ MORE

Jun 22, 2022 in TypeSript by Logan
 • 2,140 points • 617 views
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1 answer

Is TypeScript really a superset of JavaScript?

The purpose of TypeScript is to have ...READ MORE

Aug 3, 2022 in TypeSript by Abhinaya
 • 1,160 points • 612 views
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1 answer

What does the @ (at sign) mean in the latest TypeScript (presumably v1.5) example?

The big news this week is the ...READ MORE

Aug 3, 2022 in TypeSript by Abhinaya
 • 1,160 points • 610 views
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Typescript: Clicking 'X' doesn't successfully close my popup banner

I've created a popup banner with the ...READ MORE

Jul 14, 2022 in TypeSript by Logan
 • 2,140 points • 594 views
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1 answer

React Native Performance: Javascript vs Typescript

TypeScript is just compiled to JavaScript. Think ...READ MORE

Jun 13, 2022 in TypeSript by Nina
 • 3,060 points • 584 views
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1 answer

How do you run TypeScript files from command line?

You can leave tsc running in watch mode using tsc ...READ MORE

May 31, 2022 in TypeSript by Nina
 • 3,060 points • 563 views
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0 answers

Typescript hierarchical inheritance

Consider the following: class A { commonString: ...READ MORE

Jul 5, 2022 in TypeSript by Nina
 • 3,060 points
edited Dec 6, 2023 by Soumya • 540 views
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What is a type in Typescript for the Component class in Angular 2+?

I have a small problem, but big ...READ MORE

Jul 5, 2022 in TypeSript by Logan
 • 2,140 points • 535 views
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User-Defined Extended Enums in TypeScript

I am writing a TypeScript library that ...READ MORE

Jul 18, 2022 in TypeSript by Logan
 • 2,140 points • 506 views
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How can I create a navigational compass using Typescript and HTML?

I'm looking to display a compass heading ...READ MORE

Jul 13, 2022 in TypeSript by Logan
 • 2,140 points • 478 views
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0 answers

Why I can't create Face3 in ThreeJS Typescript project

I am trying to create Mesh by ...READ MORE

Jul 5, 2022 in TypeSript by Logan
 • 2,140 points • 475 views
0 votes
1 answer

Mixing JavaScript and TypeScript in Node.js

Combine the following TypeScript compiler options --allowJs Explicitly supports ...READ MORE

Jun 15, 2022 in TypeSript by Nina
 • 3,060 points • 453 views
0 votes
1 answer

How to create ES6 Map in Typescript

Refer this as an example this.configs = new ...READ MORE

May 31, 2022 in TypeSript by Nina
 • 3,060 points • 445 views
0 votes
0 answers

Is there any official Typescript definition for fabric.js?

At the moment, I am able to ...READ MORE

Jul 5, 2022 in TypeSript by Logan
 • 2,140 points • 441 views
0 votes
1 answer

Get typescript definition files via bower?

It is possible with bower. First install bower ...READ MORE

Aug 3, 2022 in TypeSript by Abhinaya
 • 1,160 points • 432 views
0 votes
1 answer

Is it possible to extend types in Typescript?

you can intersect types: type TypeA = { ...READ MORE

Jun 7, 2022 in TypeSript by Nina
 • 3,060 points • 422 views
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