jsx Archives - IT Nursery

Dynamic tag name in React JSX

I am trying to write a React component for HTML heading tags(h1, h2, h3, etc.), where the heading level is specified via a … Read more

Render HTML string as real HTML in a React component

by IT Nursery

Here’s what I tried and how it goes wrong. This works: <div dangerouslySetInnerHTML={{ __html: “<h1>Hi there!</h1>” }} /> This doesn’t: <div dangerouslySetInnerHTML={{ __html: … Read more

Cannot use JSX unless the ‘–jsx’ flag is provided

by IT Nursery

I have looked around a bit for a solution to this problem. All of them suggest adding “jsx”: “react” to your tsconfig.json file. … Read more

ReactJs: What should the PropTypes be for this.props.children?

by IT Nursery

Given a simple component that renders its children: class ContainerComponent extends Component { static propTypes = { children: PropTypes.object.isRequired, } render() { return … Read more

How to use componentWillMount() in React Hooks?

by IT Nursery

In the official docs of React it mentions – If you’re familiar with React class lifecycle methods, you can think of useEffect Hook … Read more

ReactJS – .JS vs .JSX

by IT Nursery

There is something I find very confusing when working in React.js. There are plenty of examples available on internet which use .js files … Read more

TypeScript and React – children type?

by IT Nursery

I have a very simple functional component as follows: import * as React from ‘react’; export interface AuxProps { children: React.ReactNode } const … Read more

Uncaught Error: Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/function but got: object

by IT Nursery

I am getting this error: Uncaught Error: Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/function (for … Read more

Loop inside React JSX

by IT Nursery

I’m trying to do something like the following in React JSX (where ObjectRow is a separate component): <tbody> for (var i=0; i < … Read more