typescript Archives - Page 2 of 10

Programming, typescript

IT Nursery

“parserOptions.project” has been set for @typescript-eslint/parser

I created a new React Native project with --template typescript I deleted the template directory which came as part of the boilerplate. I ...

May 31, 2022
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Programming, typescript

IT Nursery

Angular 2 beta.17: Property ‘map’ does not exist on type ‘Observable’

I just upgraded from Angular 2 beta16 to beta17, which in turn requires rxjs 5.0.0-beta.6. (Changelog here: https://github.com/angular/angular/blob/master/CHANGELOG.md#200-beta17-2016-04-28) In beta16 all was working ...

May 31, 2022
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Programming, typescript

IT Nursery

Angular 2 Show and Hide an element

I’m having a problem hiding and showing an element depending of a boolean variable in Angular 2. this is the code for the ...

May 31, 2022
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Programming, typescript

IT Nursery

‘this’ implicitly has type ‘any’ because it does not have a type annotation

When I enable noImplicitThis in tsconfig.json, I get this error for the following code: 'this' implicitly has type 'any' because it does not ...

May 30, 2022
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Programming, typescript

IT Nursery

How can I solve the error ‘TS2532: Object is possibly ‘undefined’?

I’m trying to rebuild a web app example that uses Firebase Cloud Functions and Firestore. When deploying a function I get the following ...

May 30, 2022
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Programming, typescript

IT Nursery

How to get a variable type in Typescript?

I have a variable. abc:number|string; How can I check its type? I want to do something like below: if (abc.type === "number") { ...

May 29, 2022
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Programming, typescript

IT Nursery

What’s the difference between ‘extends’ and ‘implements’ in TypeScript

I would like to know what Man and Child have in common and how they differ. class Person { name: string; age: number; ...

May 29, 2022
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Programming, typescript

IT Nursery

TypeScript sorting an array

I’ve been trying to figure out a very strange issue I ran into with typescript. It was treating an inline Boolean expression as ...

May 28, 2022
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Programming, typescript

IT Nursery

How do you deploy Angular apps?

How do you deploy Angular apps once they reach the production phase? All the guides I’ve seen so far (even on angular.io) are ...

May 28, 2022
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Programming, typescript

IT Nursery

How do you produce a .d.ts “typings” definition file from an existing JavaScript library?

I’m using a lot of libraries both my own and 3rd party. I see the “typings” directory contains some for Jquery and WinRT… ...

May 28, 2022
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