Method handleVersionChange

fixtures/dom/src/components/Header.js:16–23

(version)

    this.state = {version, versions, production};
  }
  handleVersionChange(version) {
    const query = parse(window.location.search);
    query.version = version;
    if (query.version === 'local') {
      delete query.version;
    }
    window.location.search = stringify(query);
  }
  handleProductionChange(event) {
    const query = parse(window.location.search);
    query.production = event.target.checked;