Created
June 14, 2019 18:10
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Find differences in react prop and state updates
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| public componentDidUpdate(prevProps, prevState) { | |
| console.log('Rrow update diff:'); | |
| const nowProps = Object.entries(this.props); | |
| const addedProps = nowProps.filter(([key, val]) => { | |
| if (prevProps[key] === undefined) { | |
| return true; | |
| } | |
| if (prevProps[key] !== val) { | |
| console.log(`${key} | |
| - ${JSON.stringify(val)} | |
| + ${JSON.stringify(prevProps[key])}`); | |
| } | |
| return false; | |
| }); | |
| addedProps.forEach(([key, val]) => | |
| console.log(`${key} | |
| + ${JSON.stringify(val)}`) | |
| ); | |
| const nowState = Object.entries(this.state); | |
| const addedState = nowState.filter(([key, val]) => { | |
| if (prevState[key] === undefined) { | |
| return true; | |
| } | |
| if (prevState[key] !== val) { | |
| console.log(`${key} | |
| - ${JSON.stringify(val)} | |
| + ${JSON.stringify(prevState[key])}`); | |
| } | |
| return false; | |
| }); | |
| addedState.forEach(([key, val]) => | |
| console.log(`${key} | |
| + ${JSON.stringify(val)}`) | |
| ); | |
| } |
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