How to backgroundColor key values are map in reactjs?-CodePudding

I need to specify not in array values one Buttons should be in another color using a value in the map .
Is it any possible? I attached my code below.
CodeSandbox box Code

CodePudding user response：

You can use some function and check if index is available in queue, show red else blue.

export default function App() {
  var b = ["one", "two", "three", "soma"];
  var que = [1, 2, 3];
  return (
    <div className="App">
      {b.map((text, index) => (
        <>
          <button
            style={{
              backgroundColor: que.some((value) => value === index   1)
                ? "red"
                : "blue"
            }}
          >
            Button
          </button>
        </>
      ))}
    </div>
  );
}

Better solution:

export default function App() {
  var b = ["one", "two", "three", "soma"];
  const set = new Set([(1, 2, 3)]);

  return (
    <div className="App">
      {b.map((text, index) => (
        <>
          <button
            style={{
              backgroundColor: set.has(index   1) ? "red" : "blue",
            }}
          >
            Button
          </button>
        </>
      ))}
    </div>
  );
}

CodePudding user response：

I think you want to implement like this.

import "./styles.css";

export default function App() {
  var b = ["one", "two", "three", "soma"];
  var que = [1, 2, 3];
  return (
    <div className="App">
      {b.map((text, index) => (
        <>
          <button
            style={{
              backgroundColor: que.filter((value) =>
                value === index   1).length ? "red" : "blue"
            }}
          >
            Button
          </button>
        </>
      ))}
    </div>
  );
}

This is codepen URL https://codesandbox.io/s/sleepy-darwin-4po149?file=/src/App.js:0-415