what is jsx in react
instead of putting JavaScript into HTML,
JSX allows us to put HTML into JavaScript.
JSX stands for JavaScript XML.
It is simply a syntax extension of React.
It allows us to directly write HTML in React.what is jsx in react
instead of putting JavaScript into HTML,
JSX allows us to put HTML into JavaScript.
JSX stands for JavaScript XML.
It is simply a syntax extension of React.
It allows us to directly write HTML in React.html to jsx
1) Option One: Online
https://magic.reactjs.net/htmltojsx.htm
or
https://transform.tools/html-to-jsx
2) Option Two: System (assuming you have npm)
npm install html-to-jsxjsx react
const element = <h1>Hello World</h1>javascript react
class TodoApp extends React.Component {
constructor(props) {
super(props);
this.state = { items: [], text: '' };
this.handleChange = this.handleChange.bind(this);
this.handleSubmit = this.handleSubmit.bind(this);
}
render() {
return (
<div>
<h3>TODO</h3>
<TodoList items={this.state.items} />
<form onSubmit={this.handleSubmit}>
<label htmlFor="new-todo">
What needs to be done?
</label>
<input
id="new-todo"
onChange={this.handleChange}
value={this.state.text}
/>
<button>
Add #{this.state.items.length + 1}
</button>
</form>
</div>
);
}
handleChange(e) {
this.setState({ text: e.target.value });
}
handleSubmit(e) {
e.preventDefault();
if (this.state.text.length === 0) {
return;
}
const newItem = {
text: this.state.text,
id: Date.now()
};
this.setState(state => ({
items: state.items.concat(newItem),
text: ''
}));
}
}
class TodoList extends React.Component {
render() {
return (
<ul>
{this.props.items.map(item => (
<li key={item.id}>{item.text}</li>
))}
</ul>
);
}
}
ReactDOM.render(
<TodoApp />,
document.getElementById('todos-example')
);create react element with string
mport React from 'react'
const MyComponent = 'div'
function App() {
return (
<div>
<h1>Hello</h1>
<hr />
<MyComponent>
<h3>I am inside a {'<div />'} element</h3>
</MyComponent>
</div>
)
}react ctx
ctx is a NextJS artifact.
ctx is a context object containing those properties (Source):
pathname - path section of URL
query - query string section of URL parsed as an object
asPath - String of the actual path (including the query) shows in the browser
req - HTTP request object (server only)
res - HTTP response object (server only)
err - Error object if any error is encountered during the renderingCopyright © 2021 Codeinu
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