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dynamic useState in react

DevAndR answered on November 11, 2021 Popularity 9/10 Helpfulness 4/10

answer dynamic useState in react

dynamic useState in react

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const data = ["James", "John", "Jessica", "Jamie"];

function App() {
  const [visibilities, setVisibilities] = React.useState(() => data.map((x) => true));

  const handleClick = (event) => {
    const index = parseInt(event.currentTarget.dataset.index, 10);
    const newVisibilities = [...visibilities];
    newVisibilities[index] = !newVisibilities[index];
    setVisibilities(newVisibilities);
  };

  return (
    <div className="App">
      {data.map((value, index) => (
        <h1 data-index={index} onClick={handleClick} className={visibilities[index] ? "selected" : undefined}>
          Hello {value}, you are {visibilities[index] ? "visible" : "hidden"}!
        </h1>
      ))}
    </div>
  );
}

ReactDOM.render(<App />, document.querySelector("main"));

Popularity 9/10 Helpfulness 4/10 Language javascript

Source: stackoverflow.com

Tags: dynamic javascript use-state

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