65 items
Typing a React onChange Handler
Code QuizTyping useState & Event Handlers
QuizTyping React Props, Hooks & Events
Slides / VideoTyping React Props, Hooks & Events
FlashcardTyping React Props, State & Events
Slides / VideoTyping React Props, State & Events
FlashcardTyping React Props Correctly
Code QuizTyping React Props with Interfaces
QuizTyping React Props & State
Slides / VideoTyping React Props & State
FlashcardModule Augmentation Basics
FlashcardJSDoc @typedef Property Syntax
Code QuizMisplaced @ts-ignore Directive
Code QuizModule Augmentation Basics
Slides / VideoType-Checking JS with allowJs and checkJs
Slides / VideoGenerating Declaration Files Automatically
Slides / VideoWriting Declaration Files for Untyped Libraries
Slides / VideoInstalling @types from DefinitelyTyped
Slides / VideoAmbient Modules and Global Declarations
Slides / VideoThe declare Keyword for Ambient Declarations
Slides / VideoWhat Declaration Files Are
Slides / VideoesModuleInterop for JS Interop
Slides / VideotypeRoots and types Configuration
Slides / VideoTypeScript Check Comments Explained
Slides / VideoGradual Migration to TypeScript
Slides / VideoJSDoc Type Annotations in JavaScript
Slides / VideoTyping the global Object
QuizGradual JS to TS Migration
Quiz@param and @type Precision
QuizPurpose of Declaration Files
QuizThe declare Keyword
QuizAmbient Variable and Function Declarations
QuizInstalling @types Packages
Quizdeclare namespace Usage
QuizDeclaring Untyped Modules
QuizJSDoc Type Annotations
Quiz@ts-check and @ts-nocheck
Quiz@ts-ignore vs @ts-expect-error
QuizAutomatic Type Acquisition
QuizImplicit any from JS Import
Code QuizJSDoc @type Annotation
Code QuizUMD Global Declaration Syntax
Code QuizOverloaded Signatures in .d.ts
Code QuizJSDoc @param and @returns
Code QuizAmbient Variable with declare
Code QuizTriple-Slash Reference Syntax
Code QuizValue Inside a .d.ts File
Code QuizAmbient Function Signature
Code QuizAmbient Class Shape
Code QuizAmbient const enum
Code Quizdeclare namespace Members
Code QuizInstalling @types Packages
Code QuizGlobal Augmentation with declare global
FlashcardAmbient Functions
FlashcardWildcard Module Declarations
FlashcardJSDoc for Typing JavaScript
Flashcard@ts-ignore vs @ts-expect-error
FlashcardTriple-Slash Directives
FlashcardThe declare Keyword
Flashcard@ts-check and @ts-nocheck
FlashcardGradual JS to TS Migration
FlashcardStructure of an @types Package
FlashcardInstalling @types Packages
FlashcardHandling Implicit any
FlashcardAmbient Global Variables
FlashcardTyping a React onChange Handler
Spot the incorrect DOM event type used for a controlled input's change handler.
import { useState } from 'react';
interface SearchProps {
onSearch: (term: string) => void;
}
function Search({ onSearch }: SearchProps) {
const [term, setTerm] = useState('');
const handleChange = (e: React.MouseEvent<HTMLInputElement>) => {
setTerm(e.target.value);
onSearch(e.target.value);
};
return <input value={term} onChange={handleChange} />;
}What is the bug in this code?