babel/packages/babel-plugin-proposal-class-properties/test/fixtures/general/instance-computed/exec.js

function test(x) {
  class F {
    [x] = 1;
    constructor() {}
  }

  x = 'deadbeef';
  expect(new F().foo).toBe(1);
  x = 'wrong';
  expect(new F().foo).toBe(1);
}

test('foo');