Trending questions in TypeSript

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What is "not assignable to parameter of type never" error in TypeScript?

All you have to do is define ...READ MORE

May 31, 2022 in TypeSript by Nina
• 3,060 points
48,047 views
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1 answer

TypeScript error: "'Foo' only refers to a type, but is being used as a value here."?

To do type checking at runtime with ...READ MORE

Jun 8, 2022 in TypeSript by Nina
• 3,060 points
45,779 views
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Typescript: Property "XXX" does not exist on type 'IntrinsicAttributes & IntrinsicClassAttributes

Double check the newly added object types. ...READ MORE

Jun 8, 2022 in TypeSript by Nina
• 3,060 points
43,658 views
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1 answer

Typescript: TS7006: Parameter 'xxx' implicitly has an 'any' type

You are using the --noImplicitAny and TypeScript doesn't know ...READ MORE

Jun 10, 2022 in TypeSript by Nina
• 3,060 points
18,955 views
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1 answer

How to fix Definition for rule typescript-eslint no-use-before-declare was not found eslint typescript-eslint no-use-before-declare

Well according to this page, this rule is ...READ MORE

Jun 1, 2022 in TypeSript by Nina
• 3,060 points
17,231 views
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TypeScript TS7015: Element implicitly has an 'any' type because index expression is not of type 'number'

If you want a key/value data structure ...READ MORE

Jun 7, 2022 in TypeSript by Nina
• 3,060 points
14,074 views
0 votes
1 answer

TypeScript ES6: import module "File is not a module error"

We need the export, as a part of ...READ MORE

Jun 7, 2022 in TypeSript by Nina
• 3,060 points
13,920 views
0 votes
1 answer

TypeScript: 'tsc command not found'

A few tips in order restart the terminal restart ...READ MORE

Jun 7, 2022 in TypeSript by Nina
• 3,060 points
13,429 views
0 votes
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TypeScript - ',' expected.ts(1005)

You can't put statements in JSX curly braces, only expressions. You ...READ MORE

Jun 9, 2022 in TypeSript by Nina
• 3,060 points
13,053 views
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1 answer

TypeScript error TS2304: cannot find name ' require'

Here's a really easy work around: declare var ...READ MORE

May 31, 2022 in TypeSript by Nina
• 3,060 points
12,468 views
0 votes
1 answer

Typescript: Can't find names - Error: cannot find name

A known issue: https://github.com/angular/angular/issues/4902 Core reason: the .d.ts file implicitly included ...READ MORE

Jun 7, 2022 in TypeSript by Nina
• 3,060 points
9,929 views
0 votes
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Typescript Errors: How do I ignore the error "property does not exist on value of type"

The easiest solution to this is: (y as ...READ MORE

May 31, 2022 in TypeSript by Nina
• 3,060 points
8,700 views
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Typescript says: "types '"a"' and '"b"' have no overlap". What does it mean?

const value = Math.random() < 0.5 ? ...READ MORE

Jul 5, 2022 in TypeSript by Logan
• 2,140 points
5,902 views
0 votes
1 answer

Redux + TypeScript -> Error: A case reducer on a non-draftable value must not return undefined redux

The actual problem is with this line: state ...READ MORE

Jun 16, 2022 in TypeSript by Nina
• 3,060 points
6,637 views
0 votes
1 answer

How to use document.getElementById() method in TypeScript?

Typescript will force you to check the ...READ MORE

Jun 15, 2022 in TypeSript by Nina
• 3,060 points
6,069 views
0 votes
1 answer

What is record in TypeScript

A Record<K, T> is an object type whose property ...READ MORE

Jun 7, 2022 in TypeSript by Nina
• 3,060 points
6,196 views
0 votes
1 answer

The Angular Compiler requires TypeScript >=3.4.0 and <3.5.0 but 3.5.3 was found instead

Run this script to find exact version npm ...READ MORE

Aug 3, 2022 in TypeSript by Abhinaya
• 1,160 points
3,657 views
0 votes
1 answer

How to use useState hook in React with typescript correctly?

You can set a string type for it Explicit way: const ...READ MORE

Aug 3, 2022 in TypeSript by Abhinaya
• 1,160 points
3,464 views
0 votes
1 answer

Why is Event.target not Element in Typescript?

JLRishe's answer is correct, so I simply ...READ MORE

Aug 3, 2022 in TypeSript by Abhinaya
• 1,160 points
3,395 views
0 votes
1 answer

Using TypeScript, and Object.assign gives me an error "property 'assign' does not exist on type 'ObjectConstructor'"

You can use type assertion, like this: (<any>Object).as ...READ MORE

Aug 3, 2022 in TypeSript by Abhinaya
• 1,160 points
3,270 views
0 votes
1 answer

Typescript: Debug Failure. False expression: Non-string value passed to `ts.resolveTypeReferenceDirective`

The same as a couple of days ...READ MORE

Aug 3, 2022 in TypeSript by Abhinaya
• 1,160 points
3,236 views
0 votes
1 answer

Typescript compiler can't find node with yarn - Cannot find type definition file for 'node'

I solved it on my computer by ...READ MORE

Jun 22, 2022 in TypeSript by Nina
• 3,060 points
4,782 views
0 votes
1 answer

How to declare and initialize a Dictionary in Typescript

Apparently this doesn't work when passing the ...READ MORE

May 31, 2022 in TypeSript by Nina
• 3,060 points
5,520 views
0 votes
1 answer

Interface type check with Typescript

You can achieve what you want without ...READ MORE

May 31, 2022 in TypeSript by Nina
• 3,060 points
5,066 views
0 votes
0 answers

Javascript Arrays Opposite of Includes

What is the proper approach to remove ...READ MORE

Aug 8, 2022 in TypeSript by krishna
• 2,820 points
1,896 views
0 votes
1 answer

How to define string literal union type from constants in Typescript

You can also use enum for this ...READ MORE

Aug 3, 2022 in TypeSript by Abhinaya
• 1,160 points
1,709 views
0 votes
1 answer

VS Code enforces semicolons, but why doesn't Angular and TypeScript not use it consistently?

JavaScript has a syntactic feature known as semicolon ...READ MORE

May 31, 2022 in TypeSript by Nina
• 3,060 points
4,196 views
0 votes
1 answer

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
1,231 views
0 votes
1 answer

Definition for rule '@typescript-eslint/no-shadow' was not found

v2.34.0 of the typescript-eslint packages is 9 months ...READ MORE

Jun 13, 2022 in TypeSript by Nina
• 3,060 points
3,428 views
0 votes
1 answer

How to install and run Typescript locally in npm?

It took me a while to figure ...READ MORE

Jun 8, 2022 in TypeSript by Nina
• 3,060 points
3,628 views
0 votes
1 answer

How can I define a type for a CSS color in TypeScript?

There was a proposal for a type of ...READ MORE

Jun 15, 2022 in TypeSript by Nina
• 3,060 points
3,290 views
0 votes
1 answer

Angular/TypeScript: ng-multiselect-dropdown multiple properties in TextField

I was able to work around this ...READ MORE

Jun 13, 2022 in TypeSript by Nina
• 3,060 points
3,284 views
0 votes
1 answer

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
1,044 views
0 votes
1 answer

TypeScript: How do you loop through a dictionary?

To loop over the key/values, use a for ...READ MORE

May 31, 2022 in TypeSript by Nina
• 3,060 points
3,713 views
0 votes
1 answer

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
• 1,160 points
994 views
0 votes
1 answer

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
844 views
0 votes
0 answers

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
875 views
0 votes
1 answer

What do square brackets mean in a type definition in Typescript?

I've missed a basic type of TypeScript: Tuples. So ...READ MORE

Jun 22, 2022 in TypeSript by Nina
• 3,060 points
2,635 views
0 votes
1 answer

TypeScript and React Native: Are the type definitions for RN styles wrong?

You can test some of ways for ...READ MORE

Jun 10, 2022 in TypeSript by Nina
• 3,060 points
3,031 views
0 votes
1 answer

Angular 9 + CLI (TypeScript) - How to stop generating .spec.ts test files

If you're using v6 and need to ...READ MORE

Jun 13, 2022 in TypeSript by Nina
• 3,060 points
2,876 views
0 votes
1 answer

Square brackets around vs after expression in Typescript

x is an Array, while y is a Tuple. The ...READ MORE

Jun 7, 2022 in TypeSript by Nina
• 3,060 points
3,182 views
0 votes
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
578 views
0 votes
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
572 views
0 votes
0 answers

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
1,258 views
0 votes
0 answers
0 votes
0 answers

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
1,169 views
0 votes
1 answer

Customise Ngx-toastr in angular 6 with TypeScript

After Override this CSS in your Style.css File. I ...READ MORE

Jun 9, 2022 in TypeSript by Nina
• 3,060 points
2,737 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
346 views
0 votes
1 answer

TypeScript: Class Constructor type

class Zoo<T extends Animal> { ...READ MORE

Jun 8, 2022 in TypeSript by Nina
• 3,060 points
2,666 views