Component() — react Function Reference

Source Code

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/reactive-control-dependency-reactive-after-fixpoint.js lines 1–26

function Component(props) {
  let x = 0;

  let value = null;
  loop: for (let i = 0; i < 10; i++) {
    switch (value) {
      case true: {
        x = 1;
        break loop;
      }
      case false: {
        x = 2;
        break loop;
      }
    }

    value = props.cond;
  }

  // The values assigned to `x` are non-reactive, but the value of `x`
  // depends on the "control" variable `value` used as the switch test
  // condition. That variable is initially null on the first iteration
  // of the loop, but is later set to `props.value` which is reactive.
  // Therefore x should be treated as reactive.
  return [x];
}