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1.如何處理textarea換行在div顯示
在div的css加work-space:pre-line
2. A component is changing a controlled input of type text to be uncontrolled. Input elements should not
form
不小心寫成this.setState({user:[name]:event.target.value})
應該寫
this.setState({user:...this.state.user,[name]:event.target.value})
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