Recent questions tagged typescript

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typescript - Why is the type "never" meaningless in union types?

Typescript playground I'm having some trouble while trying to wrap my head around the fact that the type never ... I can understand it better? 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 - Ionic2 How to use JQuery Plugin in Page

I'm a newbie of ionic 2, i create project and need to jquery plugin link colorbox, slick-carousel... I've run ... I can refer to. Thanks all! 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 - create a generic function returning a function with the same signature

In Typescript I want to create a function that will take a function and return a function with the same input-output ... a promise of T; } 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 - Testing and mocking lettable operators in RxJS 5.5

Before lettable operator, I did a helper to modify debounceTime method, so it uses a TestScheduler: export ... to the debounceTime operator ? 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 - Vue Prop has no initializer and is not definitely assigned in the constructor

I am using props in Vue Class components. The props are defined in the constructor without a value. This compiles ... is my code actually wrong? 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 - Set default value for angular material datePicker with angular 5

I'm using a date picker from angular material. I want to set a default value but it is not showing the ... { dataInicial: [data_inicial], ... 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 'null' is not assignable to type 'HTMLInputElement' ReactJs

I am trying to reference data into reactJS along with typescript. While doing this I am getting below error Type ' ... I may be 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 - How to use chrome-app.d.ts type in angular-cli 1.0.1 app?

I've installed @types/chrome and add it in tsconfig.app.json "types": [ "chrome" ] But when ... /DefinitelyTyped/tree/master/types/chrome 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 - How do you call a function in a sibling component?

I have 2 sibling components that need to communicate: <app-controls></app-controls> <app-main></app-main> ... guide compliant way of doing so? 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 - Passing value between two components (pages) in Angular 2

I am using Angular 2 (TypeScript) I have two components (actually they are two pages too). They are NOT parent ... any other way? Thank you! 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 6 - ERROR TypeError: Cannot read property 'value' of undefined

I'm new to Angular and Typescript and cannot get to the bottom of this console error: "ERROR TypeError: Cannot read ... data; } } ); } } 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 - error TS2307: Cannot find module '@angular/core'

So I get the following error when I tried building my application again: ERROR in ../../../node_modules/@angular/cdk/a11y/ ... Cannot find module '@angular/core'. ../../../node_mo...

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

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typescript - How to use javascript functions in an Angular 2 component from a different file

I have a javascript file that contains some data manipulation functions (No DOM manipulation at all) such as float ... if someone can 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 - Ignore TS6133: "(import) is declared but never used"?

While working on a TypeScript project, I commented out a line, and got the error: Failed to compile ./src/ ... disable or ignore that warning? 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 Slide Up and Down Animation

I recently built the following Angular 2 Read More component. What this component does is collapse and expand long ... how to achieve this? 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 reactive form validation with <input type="file"> for an Angular app

I'm writing a component with a file picker that uploads a file to our CDN. I'm trying to add a ... I can validate against the filename. 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 - VSCode Implement Method Shortcut

I'm using VSCode, Exist, a way to implement the methods that are within an interface in typescript using some ... I have not found anything. 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 - Ways to get string literal type of array values without enum overhead

In my project I need a number of string literal types and arrays of allowed values for variuos tasks like ... and array without duplication. 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: Inserting capture element dynamically when creating components (dynamically)

My goal is to create a child component and insert into the parent component template. There are examples to do ... That doesn't work either. 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 combine known interface properties with a custom index signature?

How do you type an object that can have both a few declared optional properties, e.g.: { hello?: string, ... a boolean). This obviously fails. 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 - Intersection of mapped types

Consider the following: type Properties = { foo: { n: number }; bar: { s: string }; baz: { b: ... presence of relevant strings in an array? 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 - fetch api not returning the Location header

Here are my headers copied from chrome Version 52.0.2743.82 (64-bit) (have yet to determine whether this is ... headers? why are they missing? 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 - Deselect radio button Angular 2?

I am trying to deselect a radio button in Angular 2. I tried the following code but it doesn't help. .html ... a radio button in Angular 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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typescript - How to add a new property to a class using class decorator?

How can I add a new property to a class using a class decorator? Code for example: @MyClassDecorator class ... class using decorator? 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 2 interface for service

I want to develop a search component. Here is the following use case: This component calls a service with ... object returned by the service? 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 can you express "keyof T" to be a subset of String?

The Firebase typings have an interface IQuery which has the equalTo() method typed as: public equalTo(value: number | ... T must be a 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 - Importing from subfolders for a javascript package

I have a typescript library consists of multiple folders. Each folder contains an index.ts file which exports ... am missing something, 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 trackBy returning the index in *ngFor vs item id

I have a huge ngFor, changing frequently with asynchronous data. TrackBy allows to only refresh the changing part, ... when I return the index? See Question&Answers more detail:os...

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

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