【译】针对 Airbnb 清单页的 React 性能优化

webpack-internal:///36:36 Warning: React attempted to reuse markup in a container but the checksum was invalid. This generally means that you are using server rendering and the markup generated on the server was not what the client was expecting. React injected new markup to compensate which works but you have lost many of the benefits of server rendering. Instead, figure out why the markup being generated is different on the client or server: (client) ut-placeholder-label screen-reader-only" (server) ut-placeholder-label" data-reactid="628"

~/airbnb ❯❯❯ ag ut-placeholder-label
app/assets/javascripts/components/o2/PlaceholderLabel.jsx
85:        'input-placeholder-label': true,
 
app/assets/stylesheets/p1/search/_SearchForm.sCSS
77:    .input-placeholder-label {
321:.input-placeholder-label,
 
spec/javascripts/components/o2/PlaceholderLabel_spec.jsx
25:    const placeholderContainer = wrapper.find('.input-placeholder-label');

export
default class SummaryIconRow extends React.Component {...
    }

export
default class SummaryIconRow extends React.PureComponent {...
    }

const anchors = React.Children.map(children, (child, index) => {
  return React.cloneElement(child, {
    selected: activeAnchorIndex === index,
    onPress(event) { onAnchorPress(index, event); },
  });
});

const anchors = React.Children.map(children, (child, index) = >{
    return React.cloneElement(child, {
        selected: activeAnchorIndex === index,
        index,
        onPress: this.handlePress,
    });
});

class NavigationAnchor extends React.Component {
    constructor(props) {
        super(props);
        this.handlePress = this.handlePress.bind(this);
    }
 
    handlePress(event) {
        this.props.onPress(this.props.index, event);
    }
 
    render() {...
    }
}

this.state = { inViewport: false };

this.inViewport = false;

render() {
  ...
  const finalExperiments = {
    ...experiments,
    ...this.state.experiments,
  };
  return (
    <WrappedComponent
      {...otherProps}
      experiments={finalExperiments}
    />
  );
}

const getExperiments = createSelector(
  ({ experimentsFromProps }) => experimentsFromProps,
  ({ experimentsFromState }) => experimentsFromState,
  (experimentsFromProps, experimentsFromState) => ({
    ...experimentsFromProps,
    ...experimentsFromState,
  }),
);
...
render() {
  ...
  const finalExperiments = getExperiments({
    experimentsFromProps: experiments,
    experimentsFromState: this.state.experiments,
  });
  return (
    <WrappedComponent
      {...otherProps}
      experiments={finalExperiments}
    />
  );
}

function getFilteredAmenities(amenities) {
    return amenities.filter(shouldDisplayAmenity);
}