jsx react code example

Example 1: 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-jsx

Example 2: jsx full form

Thr process of using HTML in react is known as JSX

Example 3: 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')
);

Example 4: jsx react

const element = <h1>Hello World</h1>

Example 5: 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 rendering

Example 6: 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>
  )
}